Arousal
There has been an interesting growth in understanding the non-verbal responses of emotional status toward advertising by using neuroscience methods such as fMRI, EEG, fNIRS [ 31 , 51 , 79 , 80 , 81 , 82 ]. For example, Plichta, et al. [ 45 ] conducted an fNIRS experiment to investigate the detection of sensory activity by measuring emotional signals in the auditory field. The findings revealed that pleasurable/unpleasurable sounds increased the activity in the auditory cortex, compared to neutral sounds. Gier, et al. [ 41 ] conducted the fNIRS experiment to explore whether the fNIRS tool had the ability to predict the success of point-of-sale elements by measuring the neural signals of brain regions such as the dlPFC. The findings revealed that the fNIRS has the ability to predict the success elements at the point of sale, relying on the cortical-activity effect.
The EEG investigations of Vecchiato, et al. [ 83 ], and Vecchiato, et al. [ 84 ] found that activity in the right frontal alpha is associated with pleasure/liking ads, while the left frontal alpha correlated to displeasure/disliking ads. Additionally, Vecchiato, et al. [ 85 ] found that there were gender (i.e., male and female) differences in interest toward commercial categories and scenes in two ads. The EEG experiment of Harris, et al. [ 86 ] found that emotional advertisements are more effective than rational advertisements, which leads to a positive change in decision-making, inducing donation, and liking. The findings of Chen, et al. [ 87 ] revealed that e-cigarette ads increased the smoking desire; additionally, e-cigarette ads increased activity in the left middle-frontal-gyrus, the right medial-frontal-gyrus, the right parahippocampus, the left insula, the left lingual gyrus/fusiform gyrus, the right inferior-parietal-lobule, the left posterior-cingulate, and the left angular-gyrus. Wang, et al. [ 88 ] and Royo González, et al. [ 89 ] found that the narrative approach of ads and exposure to branding products have a favourable influence on the consumers’ preferences and excitement. The fMRI investigations of Morris, et al. [ 27 ] and Shen and Morris [ 90 ] found that pleasure and displeasure are correlated with more activity in the inferior frontal- and middle temporal-gyrus, respectively, while low and high arousal is associated with the right superior-temporal- and right middle-frontal-gyrus, consecutively. Leanza [ 91 ] used EEG and found that some of the emotive features of the virtual reality (VR) experience significantly influenced consumers’ preferences. Ramsoy, et al. [ 92 ] found that arousal and cognitive load were highly connected to subsequently stated travel-preferences; moreover, consumers’ subconscious emotional and cognitive responses are not identical to subjective travel-preference. Shestyuk, et al. [ 93 ] found that the EEG is a convenient tool to predict the success of TV programs and determine cognitive processes. Wang, et al. [ 94 ] conducted an experiment to propose a generative-design method using EEG measurements. The findings revealed that the product image that was generated with preference EEG-signals had more preference than the product image generated without preference EEG-signals. Kim, et al. [ 95 ] conducted an experiment to identify the effect of visual art (e.g., Mondrian’s and Kandinsky’s artworks) on consumers’ preferences, by using EEG. The findings showed that the visual effects induced high emotional arousal, which might promote heuristic decision-making. Mengual-Recuerda, et al. [ 96 ] found that food served by a chef positively influences emotions, while dishes with special presentations attract more attention than traditional dishes. The EEG study of Eijlers, et al. [ 31 ] found that arousal is positively connected to prominent ads in the wider population and negatively to consumer attitudes toward these ads.
According to Lang and Bradley [ 97 ], emotions and motivation processes are highly intersected and correlated. Chiew and Braver [ 98 ] and Pessoa [ 99 ] found that cognition and consumers’ behaviours are highly affected by motivational processes. For example, positive motivational stimuli will urge individuals toward achieving goals (e.g., obtain or predict a reward by performing a task correctly) [ 100 ], while negative motivational stimuli can lead to distraction [ 101 ].
Pessoa [ 102 ] and Raymond [ 103 ] suggested that motivational processes are a compass of consumers’ attitudes toward external stimuli to engage with the environment and achieve goals. Higgins [ 104 ] suggested two dimensions for measuring motivational processes such as withdrawal and approach attitudes. Researchers and practitioners attempted to investigate the neural responses of motivational processes to better understand consumers’ behaviours toward advertisements and products [ 83 ]. For example, Cherubino, et al. [ 105 ] carried out an experiment using EEG to investigate the relationship between the PFC and motivational dimensions. The findings revealed that the PFC is related to motivational dimensions, wherein the right PFC correlated to withdrawal attitudes and the left PFC related to approach attitudes. The EEG investigations of Pozharliev, et al. [ 106 ] and Zhang, et al. [ 107 ] recorded the brain responses of subjects toward luxury products (motivations). The findings showed that social motivations have a vital role in influencing the purchase of luxury products in order to satisfy social goals (at least one goal). The EEG investigation of Bosshard, et al. [ 108 ] found that liked brands reflect more motivational aspects and activity signals in the right parietal-cortices than disliked brands.
Therefore, there is a strong relationship between the activation of the PFC and motivational dimensions toward marketing stimuli such as advertisements [ 109 ]. Therefore, marketing researchers and practitioners have to focus on the motivational processes of consumers to orient the marketing mix (e.g., target-appropriate audiences and markets, increasing the effectiveness of ads and products) [ 110 ]. According to previous studies, NM research has used the approach/withdrawal attitude to evaluate TV ads [ 111 ]. Therefore, approach/withdrawal motivational attitudes are highly significant for marketing and advertising research.
According to the literature, it is highly significant for researchers and practitioners to study and know the neural responses that are responsible for reward processing, such as money, food, and social activities [ 112 , 113 , 114 , 115 ]. This is because the positive rewards such as gaining money, foods, or other types of rewards, enhance the accuracy and cognitive task [ 116 , 117 , 118 ] through modifying the early attentional process. Anderson, et al. [ 101 ] demonstrated that visual features (e.g., product design) that are correlated to reward, will make the consumer prioritize, therefore attracting the consumer’s attention automatically. For example, the design preference of a product or brand can increase the activity in the regions which are responsible for reward processing, thereby, causing more activation in regions of motivations that might impact consumers’ purchase decisions [ 29 ]. Many studies concentrated on the individual’s response toward a monetary reward by studying the approach/avoidance attitude [ 112 , 113 ]. For example, Bechara, et al. [ 119 ] carried out an experiment named the “Iowa Gambling Task” by using GSR to investigate the influence of reward on decision-making. They divided participants into two groups, the healthy group and the group with lesions in the vmPFC. The findings revealed that healthy participants sweated more, which led them to infer that participants had a negative emotional experience toward picking up cards from a monetary losing deck; meanwhile, the lesion group picked up cards regardless of whether they were cards with monetary wins or losses. Consequently, reward highly influenced decision-making [ 112 , 120 , 121 ].
Many researchers have confirmed that the importance of the striatum activity in reward processing, wherein the components of the striatum such as the caudate nucleus, nucleus accumbens (NAcc), and putamen play a central role in expectation and evaluation of reward [ 115 , 122 , 123 ]. For example, Galvan [ 124 ] and Geier, et al. [ 125 ] carried out an experiment to investigate the relationship between reward processing and the striatum. Their findings revealed that the ventral striatum (VS) has a key role in the prediction of reward. Jung, et al. [ 126 ] found that the rewards, memory, semantics, and attention regions in the brain were lit up when viewing a combination of a celebrity face and a car, compared with viewing a combination of a non-celebrity face and a car. In addition, car favourableness correlated positively with activation in the left anterior-insula, left OFC, and left higher-order visual cortex in the OL. Padmanabhan, et al. [ 127 ] investigated the influence of the reward system on attention processes. Their findings showed that incentives facilitate cognitive control. Previous neuroimaging studies demonstrated that rewards activate the ventral medial prefrontal cortex (vmPFC) and ventral striatum [ 128 , 129 , 130 ]. The ventral striatum has been discussed before as a part of the reward system [ 131 ]. Therefore, findings suggest that neurodevelopmental changes in the striatum systems may contribute to changes in how reward influences attentional processes [ 56 ].
Attention is defined as the way “people tend to seek, accept and consume the messages that meet their interests, beliefs, values, expectations and ideas, and overlook the messages that are incompatible with this system” [ 132 ]. It has also been defined as selective perception [ 133 ]. Selective perception is associated with filtering out information and concentrating on significant information (e.g., different aspects of stimulus or different stimuli) [ 134 ]. For instance, consumers are exposed to nearly 10 million bits of visual information (e.g., ads, images, sound, video, and colour) per second through their senses (e.g., eyes, ears, skin) daily. Most input information goes by unnoticed, with consumers able to process almost 40 bits of input information per second [ 29 , 135 ]. This lead us to infer that attention has a strong influence on consumer behaviour in how consumers represent, perceive and process information and thus select and prioritize information. Attentional and emotional processes are relatively intersected/connected, and emotion is considered a reliable and effective source for attracting consumers ’ attention [ 136 , 137 ]. For example, the activation in the amygdala (AMY) and cingulate cortex (CC) in the brain is related to emotional stimuli.
Attention is a significant brain process, which has a central role in measuring the effectiveness of advertising campaigns; thereby, it is an indicator of consumer’s behaviour and the effectiveness of advertising [ 138 ]. According to the literature, the majority of researchers have agreed on two systems to measure attention toward advertising: (i) bottom-up, and (ii) top-down, systems [ 28 , 139 , 140 ]. Bottom-up (visual saliency/exogenous/ involuntary) attention is the type of attentional system which is initiated by external stimuli such as colour, voice, promotion, faces, text, novelty, brightness, and so forth, which lead to a process in which information in external stimuli is received automatically. Top-down (goal-driven/endogenous/voluntary) attention is the other type of attentional system, which is initiated by internal and external goals and expectation; thereby, it is necessary to focus all your mental power toward the goal that you are looking to achieve, thereby filtering goals to achieve your goals ( Figure 4 ) [ 2 , 140 , 141 ].
The bottom-up and top-down attention processes [ 59 ].
For this reason, the underlying brain reactions of attention and visual processing are highly interesting for advertising. Moreover, the anterior cingulate cortex (ACC) is highly related to the function of top-down and bottom-up attentional systems [ 142 , 143 ]. For example, Smith and Gevins [ 144 ] found that the occipital lobe (OL) is associated with attentional processes toward TV advertisements. The EEG investigation of Kong, et al. [ 145 ] found that variation in activity in the cerebral hemisphere related to the cognitive task can help to determine the success or lack of success of the advertisement. A recent fMRI investigation by Casado-Aranda, et al. [ 146 ] found that the correspondence between advertising and gender voice (male, female) induces attention regions in the brain. Ananos [ 147 ] carried out experiment using ET to investigate the attention level and processing of information in advertising (content recognition) among elderly and young people groups. Their findings revealed that the attention level among both groups was the same, but recognition by the young-people group was higher than that of the elderly-people group for untraditional advertising. Guixeres, et al. [ 51 ] conducted an experiment to investigate the effectiveness of an ad (e.g., a recall ad) and the number of views on YouTube channels, using neural networks and neuroscience-based metrics (e.g., brain response, ECG, and ET). Their findings suggest an important relationship between neuroscience metrics and self-report of ad effectiveness (e.g., recall ad) and the number of views on YouTube. Cuesta-Cambra, et al. [ 148 ] investigated how information is processed and learned and how visual attention takes place. Their findings indicated that the visual activity of men has different patterns from women, and does not influence subsequent recall, wherein recall relies on the emotional value of ads and simplicity, while complex ads need more visual fixation and are therefore hard to remember. In addition, the importance of the playful component of memory and low-involvement processing were confirmed by EEG. Treleaven-Hassard, et al. [ 149 ] examined the engagement of the consumer with interactive TV ads with a particular brand’s logo compared with non-interactive TV ads. The findings revealed that brands linked with interactive ads attract more automatic attention. Boscolo, et al. [ 81 ] conducted an experiment using ET and questionnaires to investigate differences in the visual attention between genders (male and female), toward print ads. Their findings revealed that there is difference in visual attention in the case of male, while no differences were noticed in the case of females.
According to Simson [ 150 ], studies into the perception of value and how it is formed reflect what is known in marketing theory, wherein the marketing-mix elements can be changed to influence the perceived value of a product. However, studies on how attention systems impact consumers ’ perception and actions have been limited to consumer report and behavioural studies, which depend on a rational report; this is not enough to explain attention processes, wherein there are two attentional systems influencing consumers’ perceptions (e.g., top-down and bottom-up attention system) ( Figure 5 ) [ 59 ]. Consumer perception is the first step in engagement with marketing stimuli or any other stimuli in the environment [ 151 ]. Hogg, et al. [ 152 ] defined perception as “the process by which marketing stimuli are selected, organised, and interpreted”. Therefore, individuals add meaning and interpret it in a certain way, which leads to the perceptions of the individual’s findings for each one. As stated by Belch and Belch [ 153 ] perception processing is extremely reliant on internal processes such as prior knowledge (experiences), current goals, beliefs, expectations, needs, and moods, and also external stimuli such as colour, orientation, intensity, and movement [ 59 ]. Although this explains the process of how consumer perceptions are formed, the exact the part concerning the explanation of sensations and the internal and unique assignation of meaning to sensations is what lies concealed, and remains unexplained in detail in the current consumer-behaviour literature. However, it is widely believed that this process is driven by the unconscious.
Two attentional systems impact the consumers’ perceptions.
Cartocci, et al. [ 154 ] and Modica, et al. [ 155 ] conducted experiments to estimate the accuracy measurement of the cerebral and emotional perception of social advertising campaigns (i.e., antismoking) using several methods such as EEG, GSR, and ECG. The findings showed that the antismoking campaign which was characterized by a symbolic communication style gained the highest approach-values, as evaluated by the approach/withdrawal index. Meanwhile, an image based on “fear-arousing appeal” and with a narrative style reported the highest and lowest effort-values index, respectively. The fMRI investigation of Falk, et al. [ 156 ] predicted the out-of-sample (population) effectiveness of quit-smoking ads. The findings revealed that activity in the prior mPFC was largely predictive of the success of various advertising campaigns in the real world. Plassmann, et al. [ 157 ] carried out an experiment to study the perception of pleasantness in the taste of wines, using the fMRI tool. Their findings showed a stronger activation in the medial OFC (mOFC) regions in the brain when subjects believed they are drinking expensive wine, showing that the mOFC is responsible for experiencing pleasantness. This led to infer that the pleasantness report was correlated with perceived value and price of product more than taste itself. Neuroscientists have found that the OFC and ventromedial prefrontal cortex (vmPFC) are involved in decision-making, through the perceived value of products [ 158 ]. Nuñez-Gomez, et al. [ 159 ] carried out an experiment using EEG to examine how advertising material is perceived by two groups (e.g., healthy group and group with Asperger syndrome). The findings revealed that there are large difference between these groups in their perception of emotion and their attention variables. Gong, et al. [ 160 ] carried out an experiment to identify the influence of sales promotion (e.g., gift-giving, discount) on the perception of consumers and purchase decisions by using EEG/ERP. The findings revealed that discount promotions have more impact on purchase decisions than gift-giving sales promotions.
Memory is defined as an ongoing learning-process, which has input and output functions in the brain [ 161 , 162 ]. The input function encodes information, while the output function retrieves information, and this is very important for advertising research [ 137 , 163 ]. For example, recall and recognition advertising-information is a retrieving function [ 28 ]. Myers and DeWall [ 162 ] and Atkinson and Shiffrin [ 163 ] presented the multistore model of memory, which includes three steps, as follows: (i) a sensory memory, (ii) short-term memory (STM), and (iii) long-term memory (LTM) ( Figure 6 ) [ 164 ]. Brain processes related to memory have revealed certain valuable outcomes, as to the factors which influence the consumers’ behaviour ,such as recall- and recognition-advertising [ 165 ]. Input and output functions in the memory are highly important for marketers and advertisers, due to each function having an awareness and unawareness aspect in the brain [ 137 , 166 ]. Memory and emotion are highly connected to each other. For example, previous studies confirmed that the emotional events are usually remembered more than neutral events, and especially if emotions correspond to events at that moment [ 167 ].
The information phases in the memory’s stages [ 164 ].
The memory process has been widely studied, and it has concluded that the hippocampus (HC), located in the temporal lobe (TL), plays a major role in generating and processing memories [ 165 ]. Additionally, activation of the HC has a strong relationship with LTM and STM, which highly impacts consumers’ purchase decisions [ 168 , 169 ]. In addition, the AMY is located next and close to the HC, which is significant for the memory system [ 165 ]. For example, the EEG investigation by Rossiter, et al. [ 170 ] found that the left hemisphere is correlated with encoding in the LTM. Similarly, the EEG investigations by Astolfi, et al. [ 171 ] used EEG to determine the brain regions that were triggered by the successful memory-encoding of TV ads. They found stronger activity in the cortical regions. Morey [ 172 ] investigated the impact of advertising message on recognition memory. The findings revealed stronger activity in the gamma band, which directly affected memory. The fMRI investigation by Bakalash and Riemer [ 173 ] and Seelig, et al. [ 174 ] measured the brain regions of memory ads. The findings revealed that stronger activity in the amygdala (AMY) and frontotemporal regions is associated with memorable and unmemorable ads. Similarly, [ 175 ] carried out experiments to investigate the content of ads and the activity of frontal regions and memory. The findings showed that the content of ads increased the activity in the frontal regions and the input function (encoding) of memory.
The study of these mental processes such as emotion and feelings, attention, memory, reward processing, motivation, and perception are highly important considerations for advertising research.
A total of 76 articles were extracted and analysed, wherein the content analysis of the relevant articles revealed that the annual and the accumulative number of publications has been growing since 2009, reaching its peak in 2020 with twelve empirical articles that used neuroimaging, physiological, and self-report techniques to study the consumers’ brain processes such as, but not limited to, emotions toward the stimuli of marketing such as advertising. We followed the PRISMA protocol to select the relevant empirical articles for this study as brain processes such as emotions, feelings, motivation, reward, attention, and memory need to be considered in advertising research. The findings of the study revealed that the neuroimaging tool that is used most in studying the brain processes of consumers is the EEG, with 38 empirical articles, followed by the fMRI with 20 articles; it was also noticed that only four articles used the fNIRS tool in neuromarketing research. In addition, for physiological tools, it was observed that five techniques were used in neuromarketing studies to investigate consumer responses toward the stimuli of marketing such as advertising. The ET was used in 14 articles alongside neuroimaging tools such as EEG, wherein ET is the most used tool, followed by GSR with 12 articles; it was also used alongside other physiological tools such as ECG and EMG. Finally, self-report (i.e., surveys, interviews, focus groups, and observation) was used in seven articles.
This study found that the brain processes to be considered most in advertising research are emotions, feelings, attention, memory, perception, approach/withdrawal motivation, and reward processing. The findings demonstrated that the strongest activity in the inferior-frontal- and middle-temporal-gyri are associated with pleasure and displeasure, while the activity in the right superior-temporal and the right middle-frontal-gyrus correlated with high or low arousal [ 90 ]. As well as this, we found the OL connected with the attention system [ 144 ], and the HC, located in the temporal lobe (TL), plays a major role in generating and processing memories [ 165 ]. In addition, the VS, which is located in the basal ganglia plays a central role in the reward system; for example, the key functions of VS (i.e., control movement and planning) have a vital role in the reward system, while the components of VS such as the putamen, caudate nucleus, and nucleus accumbens (NAcc) have a central role in the assessment of consumer expectations, compared to the actual reward received [ 123 ]. In addition, the ventral tegmental region is considered a part of the reward system, which passes the neurotransmitter dopamine to other brain areas, thereby affecting goal-seeking behaviour [ 123 ]. For motivation, it was found that the anterior cerebral hemispheres play a central role in withdrawal and approach motivation; for example, the increase in activation in the right PFC is linked to withdrawal behaviour, while the increase in activation in the left PFC is associated with approach behaviour [ 105 , 176 ]. Finally, in accordance with the literature, it was found that the OFC and vmPFC regions play vital roles in perception (i.e., perceived value) [ 158 ].
Implication of the research findings for theory and practice: Theoretically, the current findings can be divided into three areas, as follows: firstly, neuroscientific techniques and methods enable the capture/measurement of the activity signals of the brain and body relating to consumers’ responses (e.g., emotions and feelings, attention, memory, perception, reward processing, and motivation) toward advertising campaigns. For example, neuroimaging tools (e.g., fMRI, EEG/ERP, fNIRS) enable the recording of the neural signals of the mental responses (e.g., pleasure/displeasure, low/high arousal, advertising recall and recognition) toward advertising, which can be beneficial for advertisers and marketers in creating more effective advertising campaigns to attract, captivate, and impact consumers. Meanwhile, physiological tools (e.g., ET, GSR, EMG, and ECG) enable researchers to gauge the physiological reactions of the consumer, such as pupil dilation, fixation, eye movements, saccade, heart rate, blood pressure, sweating level, and reaction time toward advertising. Secondly, neuroimaging and physiological tools will help advertisers and scholars to identify the weak elements in advertising which lead to withdrawal behaviour and to address these, besides identifying the strengths which lead to approach behaviour, and to enhance them. Thirdly, many articles have concentrated on detecting the neural and physiological responses of emotions, feelings, attention, memory, reward processing, motivation and perception toward advertising such as the presenter’s features (i.e., celebrity), because these processes play a key role in the decision-making of consumers (i.e., purchasing decisions). Additionally, some advertising research concentrated on gender voice (i.e., male, female), ads appeal, faces of celebrity, social campaigns (i.e., using seat belts in the car), and public health (i.e., anti-smoking campaigns). These areas can provide a reasonable explanation of the neural and physiological correlates of emotions and feelings (e.g., pleasure/displeasure, high/low arousal), attention (e.g., top-down, bottom-up), memory (e.g., encoding, retrieving), motivation (e.g., approach/withdrawal), reward processing, and perception (e.g., perceived value of ads) to be considered in advertising research. Thus, an application of this research perhaps offers reasonable explanations of how advertising works in consumers’ minds, and the relationship between the neural correlates of consumers’ brain and physiological responses toward advertising, thereby better understanding consumers’ behaviour, which leads to the creation of more attractive advertising for political, social and business sectors.
General Conclusion : Neuromarketing is a promising field, not only to study and solve the commercial issues such as the weaknesses of advertising campaigns and to reduce the wastage of advertising budgets, but also to create more effective advertising campaigns in social, political, and public-health sectors, in order to increase human awareness. In today’s hyper-competitive environments among advertising agencies, each agency seeks to find the most beneficial methods to beat competitors and be the first priorities in the consumer’s mind. Thus, advertisers have adopted neuroscientific methods in their research to study, analyse, and predict the neural and physiological responses of consumers toward the stimuli of marketing (i.e., advertising), thereby identifying the most important mental and physiological responses to be considered in advertising research to raise advertising effectiveness. Most studies in advertising research have determined the main mental processes of interest for advertising research, such as emotions and feelings, attention, memory, reward processing, motivation, and perception.
The findings of the study suggest that neuroscientific methods and techniques are significant to gauge the brain and physiological reactions of consumers toward the stimuli of marketing, such as advertising research. For example, neuroimaging tools are able to gauge the neural-activity signals of the consumer’s brain. At the same time, physiological tools can gauge physiological reactions such as eye movements, sweating level, and fixation.
This paper tried to minimize the limitations in methodology; however, some limitations occurred and provided several directions for further research. This research concentrated on the English articles that were published in open-access journals from 2009 to 2020 and were listed in the WOS database. Therefore, this paper overlooked non-English articles, non-open-access articles, and other documents such as books, review papers, conference proceedings, and so forth. Thus, this paper is not free of bias. For future directions, we hope to overcome the obstacles in the future, which include the cost of research and techniques, lack of labs and facilities, use of time (e.g., data interpretation, recruiting participants, and so forth), and increased investment and funding in neuromarketing research and technique [ 177 ]. We encourage researchers and marketers from emerging countries to enter this embryonic field and leave their footprint by publishing articles for future works. In addition, we suggest that researchers and scholars identify the influence of advertising on consumers persuasion, engagement, and excitement, as well as the contributions of neuromarketing research to various domains (e.g., social sciences, public health, politics, and stock exchanges). We believe that this review study provides a profound overview of the global academic-trends in neuromarketing research, using the neuroimaging and physiological studies in advertising to study the brain processes of consumers. Thus, it provides valuable and reliable insights into the appropriate brain processes to be considered in future research.
The authors would like to thank Universiti Teknologi Malaysia (UTM), Azman Hashim International Business School (AHIBS); Taif University, Department of Economic & Finance, College of Business Administration; and Applied Science Private University (ASU), Department of Marketing for supporting this study.
This research received no external funding.
A.H.A., conceptualization, methodology, writing—original draft preparation, result discussion, and data curation; N.Z.M.S., supervision, review and editing; S.A.A.-Z., review, editing, and methodology; A.K., review and results discussion. All authors have read and agreed to the published version of the manuscript.
Informed consent statement, data availability statement, conflicts of interest.
The authors declare no conflict of interest.
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This cover image released by Simon & Schuster shows “Something Lost, Something Gained: Reflections on Life, Love and Liberty” by Hillary Rodham Clinton. The book will be released Sept. 17. (Simon & Schuster via AP)
Hillary Clinton’s next book is a collection of essays, touching upon everything from marriage to politics to faith, that her publisher is calling her most personal yet.
Simon and Schuster announced Tuesday that Clinton’s “Something Lost, Something Gained: Reflections on Life, Love and Liberty” will be released Sept. 17.
Among the topics she will cover: Her marriage to former President Bill Clinton, her Methodist faith, adjusting to private life after her failed presidential runs, her friendships with other first ladies and her takes on climate change, democracy and Vladimir Putin.
“The book reads like you’re sitting down with your smartest, funniest, most passionate friend over a long meal,” Clinton’s editor, Priscilla Painton, said in a statement.
“This is the Hillary Americans have come to know and love: candid, engaged, humorous, self-deprecating — and always learning.”
Clinton, the former first lady, U.S. senator and secretary and presidential candidate, will promote her book with a cross country tour. “Something Lost, Something Gained” comes out two months before Bill Clinton’s memoir about post-presidential life, “Citizen.”
Financial terms were not disclosed. Clinton was represented by Washington attorney Robert Barnett, whose other clients have included former President George W. Bush and former President Barack Obama.
Clinton’s previous books include such bestsellers as “It Takes a Village,” “Living History” and “What Happened.”
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GPT-4, as the most advanced version of OpenAI’s large language models, has attracted widespread attention, rapidly becoming an indispensable AI tool across various areas. This includes its exploration by scientists for diverse applications. Our study focused on assessing GPT-4’s capabilities in generating text, tables, and diagrams for biomedical review papers. We also assessed the consistency in text generation by GPT-4, along with potential plagiarism issues when employing this model for the composition of scientific review papers. Based on the results, we suggest the development of enhanced functionalities in ChatGPT, aiming to meet the needs of the scientific community more effectively. This includes enhancements in uploaded document processing for reference materials, a deeper grasp of intricate biomedical concepts, more precise and efficient information distillation for table generation, and a further refined model specifically tailored for scientific diagram creation.
Peer Review reports
A comprehensive review of a research field can significantly aid researchers in quickly grasping the nuances of a specific domain, leading to well-informed research strategies, efficient resource utilization, and enhanced productivity. However, the process of writing such reviews is intricate, involving multiple time-intensive steps. These include the collection of relevant papers and materials, the distillation of key points from potentially hundreds or even thousands of sources into a cohesive overview, the synthesis of this information into a meaningful and impactful knowledge framework, and the illumination of potential future research directions within the domain. Given the breadth and depth of biomedical research—one of the most expansive and dynamic fields—crafting a literature review in this area can be particularly challenging and time-consuming, often requiring months of dedicated effort from domain experts to sift through the extensive body of work and produce a valuable review paper [ 1 , 2 ].
The swift progress in Natural Language Processing (NLP) technology, particularly with the rise of Generative Pre-trained Transformers (GPT) and other Large Language Models (LLMs), has equipped researchers with a potent tool for swiftly processing extensive literature. A recent survey indicates that ChatGPT has become an asset for researchers across various fields [ 3 ]. For instance, a PubMed search for “ChatGPT” yielded over 1,400 articles with ChatGPT in their titles as of November 30th, 2023, marking a significant uptake just one year after ChatGPT’s introduction.
The exploration of NLP technology’s capability to synthesize scientific publications into comprehensive reviews is ongoing. The interest in ChatGPT’s application across scientific domains is evident. Studies have evaluated ChatGPT’s potential in clinical and academic writing [ 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 ], and discussions are underway about its use as a scientific review article generator [ 11 , 12 , 13 ]. However, many of these studies predate the release of the more advanced GPT-4, which may render their findings outdated. In addition, there is no study specifically evaluating ChatGPT (GPT-4) for writing biomedical review papers.
As the applications of ChatGPT are explored, the scientific community is also examining the evolving role of AI in research. Unlike any tool previously utilized in the history of science, ChatGPT has been accorded a role akin to that of a scientist, even being credited as an author in scholarly articles [ 14 ]. This development has sparked ethical debates. While thorough evaluations of the quality of AI-generated scientific review articles are yet to be conducted, some AI tools, such as Scopus AI [ 15 ], are already being employed to summarize and synthesize knowledge from scientific literature databases. However, these tools often come with disclaimers cautioning users about the possibility of AI generating erroneous or offensive content. Concurrently, as ChatGPT’s potential contributions to science are probed, concerns about the possible detrimental effects of ChatGPT and other AI tools on scientific integrity have been raised [ 16 ]. These considerations highlight the necessity for more comprehensive evaluations of ChatGPT from various perspectives.
In this study, we hypothesized that ChatGPT can compose text, tables and figures for a biomedical research paper using two cancer research papers as benchmarks. To test this hypothesis, we used the first paper [ 17 ] to prompt ChatGPT to generate the main ideas and summarize text. Next, we used the second paper [ 18 ] to assess its ability to create tables and figures/graphs. We simulated the steps a scientist would take in writing a cancer research review and assessed GPT-4’s performance at each stage. Our findings are presented across four dimensions: the ability to summarize insights from reference papers on specific topics, the semantic similarity of GPT-4 generated text to benchmark texts, the projection of future research directions based on current publications, and the synthesis of context in the form of tables and graphs. We conclude with a discussion of our overall experience and the insights gained from this study.
The design of this study aims to replicate the process a scientist undergoes when composing a biomedical review paper. This involves the meticulous collection, examination, and organization of pertinent references, followed by the articulation of key topics of interest into a structured format of sections, subsections, and main points. The scientist then synthesizes information from the relevant references to develop a comprehensive narrative. A primary objective of this study is to assess ChatGPT’s proficiency in distilling insights from references into coherent text. To this end, a review paper on sex differences in cancer [ 17 ] was chosen as a benchmark, referred to as BRP1 (Benchmark Review Paper 1). Using BRP1 for comparison, ChatGPT’s content generation was evaluated across three dimensions: (1) summarization of main points; (2) generation of review content for each main point; and (3) synthesis of information from references to project future research directions.
The effectiveness of GPT-4 in summarizing information was tested by providing it with the 113 reference articles from BRP1 to generate a list of potential sections for a review paper. The generated sections were then compared with BRP1’s actual section titles for coverage evaluation (Fig. 1 (A)). Additionally, GPT-4 was tasked with creating possible subsections using the BRP1 section titles and reference articles, which were compared with the actual subsection titles in BRP1.
The review content generation test involved comparing GPT-4’s ability to summarize a given point with the actual text content from BRP1 (Fig. 1 (B)). BRP1 comprises three sections with seven subsections, presenting a total of eight main points. The corresponding text content for each point was manually extracted from BRP1. Three strategies were employed for GPT-4 to generate detailed elaborations for these main points: (1) providing a point only in a prompt for baseline content generation; (2) feeding all references used by BRP1 to GPT-4 for reference-based content generation; (3) using only the references corresponding to a main point, i.e., articles being referred in a subsection of BRP1, for content generation to make a main point. The semantic similarity of the text content generated by these strategies was then compared with the manually extracted content from BRP1.
( A ) GPT-4 summarizes sections and subsections; ( B ) GPT-4 generated review content evaluation
The section on “outstanding questions” in the Concluding Remarks of BRP1 serves a dual purpose: it summarizes conclusions and sets a trajectory for future research into sex differences in cancer. This is a common feature in biomedical review papers, where a forward-looking analysis is synthesized from the main discussions within the paper. The pivotal inquiry is whether ChatGPT, without further refinement, can emulate this forward projection using all referenced articles. The relevance of such a projection is contingent upon its alignment with the main points and references of the review. Moreover, it raises the question of whether the baseline GPT-4 LLM would perform comparably.
To address these queries, all references from BRP1 were inputted into GPT-4 to generate a section akin to Concluding Remarks, encompassing a description of sex differences in cancer, future work, and potential research trajectories. Additionally, three distinct strategies were employed to assess GPT-4’s ability to formulate specific “outstanding questions,” thereby evaluating ChatGPT’s predictive capabilities for future research. These strategies involved uploading all BRP1 reference articles to GPT-4 for projection: (1) without any contextual information; (2) with the inclusion of BRP1’s main points; (3) with a brief description of broad areas of interest. The outputs from these strategies, along with the base model’s output—GPT-4 without reference articles—were juxtaposed with BRP1’s original “outstanding questions” for comparison.
Chatgpt query.
In initiating this study, we utilized the ChatGPT web application ( https://chat.openai.com/ ). However, we encountered several limitations that impeded our progress:
A cap of ten file uploads, which restricts the analysis of content synthesized from over ten articles.
A file size limit of 50 MB, hindering the consolidation of multiple articles into a single file to circumvent the upload constraint.
Inconsistencies in text file interpretation when converted from PDF format, rendering the conversion of large PDFs to smaller text files ineffective.
Anomalies in file scanning, where ChatGPT would occasionally process only one of several uploaded files, despite instructions to utilize all provided files.
Due to these constraints, we transitioned to using GPT-4 API calls for all tests involving document processing. The GPT-4 API accommodates up to twenty file uploads simultaneously, efficiently processes text files converted from PDFs, and demonstrates reliable file scanning for multiple documents. The Python code, ChatGPT prompts, and outputs pertinent to this study are available in the supplementary materials.
The web version of ChatGPT cannot read from all the PDFs uploaded and is able to process only a subset of them. However, the API version of ChatGPT was set up to be able to upload and process 20 PDFs at a time. Several validation tests were carried out to make sure that it is able to read from all of them equally well. One common validation test was to ask ChatGPT if it could reiterate the Methods section of the 18th PDF and so on. This test was carried out randomly multiple times with a different PDF each time to see if ChatGPT is truly able to upload and process the PDFs.
To assess text content similarity, we employed a transformer network-based pre-trained model [ 19 ] to calculate the semantic similarity between the original text in BRP1 and the text generated by GPT-4. We utilized the util.pytorch_cos_sim function from the sentence_transformers package to compute the cosine similarity of semantic content. Additionally, we conducted a manual validation where one of the authors compared the two texts and then categorized the similarity between the GPT-4 generated content and the original BRP1 content into three distinct levels: semantically very similar (Y), partially similar (P), and not similar (N).
The inherent randomness in ChatGPT’s output, attributable to the probabilistic nature of large language models (LLMs), necessitates the validation of reproducibility for results derived from ChatGPT outputs. To obtain relatively consistent responses from ChatGPT, it is advantageous to provide detailed context within the prompt, thereby guiding the model towards the desired response. Consequently, we replicated two review content generation tests, as depicted in Fig. 1 (B)—one based on point references and the other on the GPT-4 base model—one week apart using identical reference articles and prompts via API calls to GPT-4. The first test aimed to evaluate the consistency of file-based content generation by GPT-4, while the second assessed the base model. We compared the outputs from the subsequent run with those from the initial run to determine the reproducibility of the text content generated by ChatGPT.
Prior to considering the utilization of ChatGPT for generating content suitable for publication in a review paper, it is critical to address potential plagiarism concerns. The pivotal question is whether text produced by GPT-4 would be flagged as plagiarized by anti-plagiarism software. In this study, GPT-4 generated a substantial volume of text, particularly for the text content comparison test (Fig. 1 (B)). We subjected both the base model-generated review content and the reference-based GPT-4 review content to scrutiny using iThenticate to ascertain the presence of plagiarism.
Review papers often distill the content from references into tables and further synthesize this information into figures. In this study, we evaluated ChatGPT’s proficiency in generating content in tabular and diagrammatic formats, using benchmark review paper 2 (BRP2) [ 18 ] as a reference, as illustrated in Fig. 2 . The authors of BRP2 developed the seminal Cancer-Immunity Cycle concept, encapsulated in a cycle diagram, which has since become a structural foundational for research in cancer immunotherapy.
Analogous to the file scan anomaly, ChatGPT may disproportionately prioritize one task over others when presented with multiple tasks simultaneously. To mitigate this in the table generation test, we adopted a divide-and-conquer approach, submitting separate GPT-4 prompts to generate content for each column of the table. This strategy facilitated the straightforward assembly of the individual outputs into a comprehensive table, either through GPT-4 or manual compilation.
In BRP2, eleven reference articles were utilized to construct a table (specifically, Table 1 of BRP2) that categorized positive and negative regulators at each stage of the Cancer-Immunity Cycle. These articles were compiled and inputted into ChatGPT, prompting GPT-4 to summarize information for corresponding table columns: Steps, Stimulators, Inhibitors, Other Considerations, and Example References. The content for each column was generated through separate GPT-4 API calls and subsequently compared manually with the content in the original BRP2 table. The semantic similarity and manual validations were carried out for each row of the Table 1 from BRP2. With the API version, we uploaded the references cited within the corresponding row in the table and used that to generate the contents of the row.
ChatGPT is primarily designed for text handling, yet its capabilities in graph generation are increasingly being explored [ 20 ]. DALL-E, the model utilized by ChatGPT for diagram creation, has been trained on a diverse array of images, encompassing various subjects, styles, contexts, and including scientific and technical imagery. To direct ChatGPT towards producing a diagram that closely aligns with the intended visualization, a precise and succinct description of the diagram is essential. Like the approach for table generation, multiple prompts may be required to facilitate incremental revisions in the drawing process.
In this evaluation, we implemented three distinct strategies for diagram generation, as demonstrated in Fig. 2 . Initially, the 11 reference articles used for table generation were also employed by GPT-4 to generate a description for the cancer immunity cycle, followed by the creation of a diagrammatic representation of the cycle by GPT-4. This approach not only tested the information synthesis capability of GPT-4 but also its diagram drawing proficiency. Secondly, we extracted the paragraph under the section titled ‘The Cancer-Immunity Cycle’ from BRP2 to serve as the diagram description. Terms indicative of a cyclical structure, such as ‘cycle’ and ‘step 1 again,’ were omitted from the description prior to its use as a prompt for diagram drawing. This tested GPT-4’s ability to synthesize the provided information into an innovative cyclical structure for cancer immunotherapy. Lastly, the GPT-4 base model was tasked with generating a cancer immunity mechanism and its diagrammatic representation without any given context. The diagrams produced through these three strategies were scrutinized and compared with the original cancer immunity cycle figure in BRP2 to assess the scientific diagram drawing capabilities of GPT-4.
GPT-4 table generation and figure creation
Main point summary.
As depicted in Fig. 1 A, GPT-4 generated nine potential sections for a proposed paper entitled ‘The Spectrum of Sex Differences in Cancer,’ utilizing the 113 reference articles uploaded, which encompassed all three sections in BRP1. Upon request to generate possible subsections using BRP1 section titles and references, GPT-4 produced four subsections for each section, totaling twelve subsections that encompassed all seven subsections in BRP1. Detailed information regarding GPT-4 prompts, outputs, and comparisons with BRP1 section and subsection titles is provided in the supplementary materials.
The results suggest that ChatGPT can effectively summarize the key points from a comprehensive list of documents, which is particularly beneficial when composing a review paper that references hundreds of articles. With ChatGPT’s assistance, authors can swiftly summarize a list of main topics for further refinement, organization, and editing. Once the topics are finalized, GPT-4 can easily summarize different aspects for each topic, aiding authors in organizing the subsections. This indicates a novel approach to review paper composition that could be more efficient and productive than traditional methods. It represents a collaborative effort between ChatGPT and the review writer, with ChatGPT sorting and summarizing articles, and the author conducting high-level and creative analysis and editing.
During this evaluation, one limitation of GPT-4 was identified: its inability to provide an accurate list of articles referenced for point generation. This presents a challenge in developing an automated pipeline that enables both information summarization and file classification.
Figure 3 illustrates a sample of the text content generation, including the original BRP1 text, the prompt, and ChatGPT’s output. The evaluation results for GPT-4’s review content generation are presented in Table 1 (refer to Fig. 1 B). When generating review content using corresponding references as in BRP1, GPT-4 achieved an average similarity score of 0.748 with the original content in BRP1 across all main points. Manual similarity validation confirmed that GPT-4 generated content that was semantically similar for all 8 points, with 6 points matching very well (Y) and 2 points matching partially (P). When utilizing all reference articles for GPT-4 to generate review content for a point, the mean similarity score was slightly lower at 0.699, with a manual validation result of 5Y3P. The results from the GPT-4 based model were comparable to the corresponding reference-based results, with a mean similarity score of 0.755 and a 6Y2P manual validation outcome.
Text generation using GPT4 with specific references ( A ) Original section in BRP1 ( B ) Prompt for same section ( C ) Response from GPT4
As the GPT-4 base model has been trained on an extensive corpus of scientific literature, including journals and articles that explore sex differences in cancer, it is plausible for it to generate text content similar to the original review paper, even for a defined point without any contextual input. The performance when using corresponding references is notably better than when using all references, suggesting that GPT-4 processes information more effectively with relevant and less noisy input.
The similarity score represents only the level of semantic similarity between the GPT-4 output and the original review paper text. It should not be construed as a measure of the quality of the text content generated by GPT-4. While it is relatively straightforward to assess the relevance of content for a point, gauging comprehensiveness is nearly impossible without a gold standard. However, scientific review papers are often required in research areas where such standards do not yet exist. Consequently, this review content similarity test merely indicates whether GPT-4 can produce text content that is semantically akin to that of a human scholar. Based on the results presented in Table 1 , GPT-4 has demonstrated adequate capability in this regard.
In this evaluation, GPT-4 initially synthesized content analogous to the Concluding Remarks section of BRP1 by utilizing all reference articles, further assessing its capability to integrate information into coherent conclusions. Subsequently, GPT-4 projected future research directions using three distinct methodologies. The findings, as detailed in Table 2 , reveal that GPT-4’s content generation performance significantly increased from 0.45 to 0.71 upon the integration of all pertinent references, indicating that the provision of relevant information markedly enhances the model’s guidance. Consequently, although GPT-4 may face challenges in precisely replicating future research due to thematic discrepancies, equipping it with a distinct theme can empower it to produce content that more accurately represents the intended research trajectory. In contrast, the performance of the GPT-4 base model remained comparably stable, regardless of additional contextual cues. Manual verification confirmed GPT-4’s ability to synthesize information from the provided documents and to make reasonably accurate predictions about future research trajectories.
The comparative analysis of GPT-4 outputs from different runs is presented in Table 3 . Based on previous similarity assessments, a similarity score of 0.7 is generally indicative of a strong semantic correlation in the context of this review paper. In this instance, GPT-4 outputs using corresponding references exhibited an average similarity score of 0.8 between two runs, while the base model scored 0.9. A manual review confirmed that both outputs expressed the same semantic meaning at different times. Consequently, it can be concluded that GPT-4 consistently generates uniform text responses when provided with identical prompts and reference materials.
An intriguing observation is that the GPT-4 base model appears to be more stable than when utilizing uploaded documents. This may suggest limitations in GPT-4’s ability to process external documents, particularly those that are unstructured or highly specialized in scientific content. This limitation aligns with our previous observation regarding GPT-4’s deficiency in cataloging citations within its content summaries.
The plagiarism assessment conducted via iThenticate ( https://www.ithenticate.com/ ) yielded a percentage score of 34% for reference-based GPT-4 content generation and 10% for the base model. Of these percentages, only 2% and 3%, respectively, were attributed to matches with the original review paper (BRP1), predominantly due to title similarities, as we maintained the same section and subsection titles. A score of 34% is typically indicative of significant plagiarism concerns, whereas 10% is considered minimal. These results demonstrate the GPT-4 base model’s capacity to expound upon designated points in a novel manner, minimally influenced by the original paper. However, the reference-based content generation raised concerns due to a couple of instances of ‘copy-paste’ style matches from two paragraphs in BRP1 references [ 21 , 22 ], which contributed to the elevated 34% score. In summary, while the overall content generated by ChatGPT appears to be novel, the occurrence of sporadic close matches warrants scrutiny.
This finding aligns with the theoretical low risk of direct plagiarism by ChatGPT, as AI-generated text responses are based on learned patterns and information, rather than direct ‘copy-paste’ from specific sources. Nonetheless, the potential for plagiarism and related academic integrity issues are of serious concern in academia. Researchers have been exploring appropriate methods to disclose ChatGPT’s contributions in publications and strategies to detect AI-generated content [ 23 , 24 , 25 ].
Table construction in scientific publications often necessitates a more succinct representation of relationships and key terms compared to text content summarization and synthesis. This requires ChatGPT to extract information with greater precision. For the five columns of information compiled by GPT-4 for Table 1 in BRP2, the Steps column is akin to summarizing section and subsection titles in BRP1. ‘ Stimulators’ and ‘ Inhibitors’ involve listing immune regulation factors, demanding more concise and precise information extraction. ‘ Other Considerations ’ encompasses additional relevant information, while ‘ Example References ’ lists citations.
For the Steps column, GPT-4 partially succeeded but struggled to accurately summarize information into numbered steps. For the remaining columns, GPT-4 was unable to extract the corresponding information accurately. Extracting concise and precise information from uploaded documents for specific scientific categories remains a significant challenge for GPT-4, which also lacks the ability to provide reference citations, as observed in previous tests. All results, including GPT prompts, outputs, and evaluations, are detailed in the supplementary materials.
In summary, GPT-4 has not yet achieved the capability to generate table content with the necessary conciseness and accuracy for information summary and synthesis.
In the diagram drawing test, we removed all terms indicative of a cyclical graph from the diagram description in the prompt to evaluate whether GPT-4 could independently recreate the original, pioneering depiction of the cancer immune system cycle. We employed three strategies for diagram generation, as depicted in Fig. 2 , which included: (1) using a diagram description generated from references and incorporated into the drawing prompt; (2) using the description from BRP2; (3) relying on the GPT-4 base model. The resulting diagrams produced by GPT-4 are presented in Fig. 4 , with detailed information provided in the supplementary materials.
( A ) Original figure ( B ) reference description ( C ) BRP2 description ( D ) base model
These diagrams highlight common inaccuracies in GPT-4’s drawings, such as misspelled words, omitted numbers, and a lack of visual clarity due to superfluous icons and cluttered labeling. Despite these issues, GPT-4 demonstrated remarkable proficiency in constructing an accurate cycle architecture, even without explicit instructions to do so.
In conclusion, while GPT-4 can serve as a valuable tool for conceptualizing diagrams for various biomedical reactions, mechanisms, or systems, professional graph drawing tools are essential for the actual creation of diagrams.
In this study, we evaluated the capabilities of the language model GPT-4 within ChatGPT for composing a biomedical review article. We focused on four key areas: (1) summarizing insights from reference papers; (2) generating text content based on these insights; (3) suggesting avenues for future research; and (4) creating tables and graphs. GPT-4 exhibited commendable performance in the first three tasks but was unable to fulfill the fourth.
ChatGPT’s design is centered around text generation, with its language model finely tuned for this purpose through extensive training on a wide array of sources, including scientific literature. Consequently, GPT-4’s proficiency in text summarization and synthesis is anticipated. When specifically comparing the API GPT model performance on a section providing specific references (references only limited to that section) and all references from the entire paper, the model does better when it is given specific references because providing all references could bring in a lot of noise. One more thing to note is that the prompt specifically mentions not to use external knowledge and hence it must process over a hundred publications and discover relevant information for the section and then compose a reply. This could explain why giving specific references improves performance over giving all references. Remarkably, the GPT-4 base model’s performance is on par with, or in some cases, slightly surpasses that of reference-based text content generation, owing to its training on a diverse collection of research articles and web text. Hence, when given a prompt and some basic points, it performs well since it already possesses all the information needed to generate an appropriate response. Furthermore, reproducibility tests have demonstrated GPT-4’s ability to generate consistent text content, whether utilizing references or solely relying on its base model.
In addition, we assessed GPT-4’s proficiency in extracting precise and pertinent information for the construction of research-related tables. GPT-4 encountered difficulties with this task, indicating that ChatGPT’s language model requires additional training to enhance its ability to discern and comprehend specialized scientific terminology from literature. This improvement necessitates addressing complex scientific concepts and integrating knowledge across various disciplines.
Moreover, GPT-4’s capability to produce scientific diagrams does not meet the standards required for publication. This shortfall may stem from its associated image generation module, DALL-E, being trained on a broad spectrum of images that encompass both scientific and general content. However, with ongoing updates and targeted retraining to include a greater volume of scientific imagery, the prospect of a more sophisticated language model with improved diagrammatic capabilities could be a foreseeable advancement.
To advance the assessment of ChatGPT’s utility in publishing biomedical review articles, we executed a plagiarism analysis on the text generated by GPT-4. This analysis revealed potential issues when references were employed, with GPT-4 occasionally producing outputs that closely resemble content from reference articles. Although GPT-4 predominantly generates original text, we advise conducting a plagiarism check on ChatGPT’s output before any formal dissemination. Moreover, despite the possibility that the original review paper BRP1 was part of GPT-4’s training dataset, the plagiarism evaluation suggests that the output does not unduly prioritize it, considering the extensive data corpus used for training the language model.
Our study also highlights the robust performance of the GPT-4 base model, which shows adeptness even without specific reference articles. This observation leads to the conjecture that incorporating the entirety of scientific literature into the training of a future ChatGPT language model could facilitate the on-demand extraction of review materials. Thus, it posits the potential for ChatGPT to eventually author comprehensive summary and synthesis-based scientific review articles. ChatGPT did not offer any citations for the PDFs that were provided to it at the time this work was written. Therefore, it is advised in such a situation to go section by section, supply a single paper, and obtain a summary of that publication alone so that the user can write a few phrases for that portion and properly credit the paper. On the other hand, the user can supply all articles for commonly recognized knowledge to produce a well-rounded set of statements that require a set of citations.
ChatGPT’s power and versatility warrant additional exploration of various facets. While these are beyond the scope of the current paper, we will highlight selected topics that are instrumental in fostering a more science oriented ChatGPT environment. Holistically speaking, to thoroughly assess ChatGPT’s proficiency in generating biomedical review papers, it is imperative to include a diverse range of review paper types in the evaluation process. For instance, ChatGPT is already equipped to devise data analysis strategies and perform data science tasks in real-time. This capability suggests potential for generating review papers that include performance comparisons and benchmarks of computational tools. However, this extends beyond the scope of our pilot study, which serves as a foundational step toward more extensive research endeavors.
Ideally, ChatGPT would conduct essential statistical analyses of uploaded documents, such as ranking insights, categorizing documents per insight, and assigning relevance weights to each document. This functionality would enable scientists to quickly synthesize the progression and extensively studied areas within a field. When it comes to mitigating hallucination, employing uploaded documents as reference material can reduce the occurrence of generating inaccurate or ‘hallucinated’ content. However, when queries exceed the scope of these documents, ChatGPT may still integrate its intrinsic knowledge base. In such cases, verifying ChatGPT’s responses against the documents’ content is vital. A feasible method is to cross-reference responses with the documents, although this may require significant manual effort. Alternatively, requesting ChatGPT to annotate its output with corresponding references from the documents could be explored, despite being a current limitation of GPT-4.
To address academic integrity concerns, as the development of LLMs progresses towards features that could potentially expedite or even automate the creation of scientific review papers, the establishment of a widely accepted ethical practice guide becomes paramount. Until such guidelines are in place, it remains essential to conduct plagiarism checks on AI-generated content and transparently disclose the extent of AI’s contribution to the published work. The advent of large language models like Google’s Gemini AI [ 26 ] and Perplexity.ai has showcased NLP capabilities comparable to those of GPT-4. This, coupled with the emergence of specialized models such as BioBert [ 27 ], BioBART [ 28 ], and BioGPT [ 29 ] for biomedical applications, highlights the imperative for in-depth comparative studies. These assessments are vital for identifying the optimal AI tool for particular tasks, taking into account aspects such as multimodal functionalities, domain-specific precision, and ethical considerations. Conducting such comparative analyses will not only aid users in making informed choices but also promote the ethical and efficacious application of these sophisticated AI technologies across diverse sectors, including healthcare and education.
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Zhiping Paul Wang, Priyanka Bhandary, Yizhou Wang & Jason H. Moore
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Z. Wang authored the main manuscript text, while P. Bhandary conducted most of the tests and collected the results. Y. Wang and J. Moore contributed scientific suggestions and collaborated on the project. All authors reviewed the manuscript.
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Wang, Z.P., Bhandary, P., Wang, Y. et al. Using GPT-4 to write a scientific review article: a pilot evaluation study. BioData Mining 17 , 16 (2024). https://doi.org/10.1186/s13040-024-00371-3
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On Mars, atomic oxygen controls the carbon dioxide radiative cooling of the upper atmosphere and the presence of an ozone layer near the poles. To remotely probe meridional transport of O atoms from the summer to the winter hemisphere and the descending flow in the winter polar regions, the O 2 Herzberg II atmospheric emission could be used as a proxy. This emission is quite weak on Earth’s nightside, but it is prominent in the Venus night airglow, and it has not previously been observed on Mars. Here we report the limb detection of the O 2 Herzberg II visible bands in the Mars nightglow with the NOMAD ultraviolet–visible spectrometer onboard the European Space Agency’s Trace Gas Orbiter. The emission layer reaches up to hundreds of kilorayleighs in the limb viewing geometry. It is mainly located between 40 km and 60 km at high latitudes during the winter season, consistent with three-body recombination of oxygen atoms. This O 2 nightglow should be observable from a Martian orbiter as well as from the Martian surface with the naked eye under clear sky conditions. These observations pave the way to future global observations of the Martian atmospheric circulation with simpler lower-cost instrumentation.
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Data availability.
The NOMAD-UVIS spectra can be downloaded from ESA’s SA archives at https://archives.esac.esa.int/psa/#!Table%20View/NOMAD=instrument (select UVIS from the list of instruments and ‘Level 3 Calibrated’ from the processing level). Observed limb intensities and model calculations supporting Fig. 4 are available from BIRA-IASB repository at https://doi.org/10.18758/71021084 or from the corresponding author upon reasonable request.
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B.H. is research associate of the Belgian Fund for Scientific Research (FNRS). ExoMars is a space mission of ESA and Roscosmos. The NOMAD experiment is led by the IASB-BIRA, assisted by co-principal-investigator teams from Spain (IAA-CSIC), Italy (INAF-IAPS) and the United Kingdom (The Open University). This project acknowledges funding from BELSPO, with the financial and contractual coordination by the ESA Prodex Office (PEA grant numbers 4000140863, 4000121493 and 4000129683). M.A.L.-V. was supported by grant number PGC2018-101836-B-100 (MCIU/AEI/FEDER, EU) and CEX2021-001131-S funded by MCIN/AEI/10.13039/501100011033. We also acknowledge support from the UK Space Agency through grant numbers ST/V002295/1, ST/V005332/1, ST/Y000234/1 and ST/X006549/1’. We thank the ESA TGO team and its project scientists H. Svedhem and C. Wilson for supporting these observations.
Authors and affiliations.
LPAP, STAR Institute, Université de Liège, Liège, Belgium
J.-C. Gérard, L. Soret & B. Hubert
Royal Belgian Institute for Space Aeronomy, Brussels, Belgium
I. R. Thomas, B. Ristic, Y. Willame, C. Depiesse, A. C. Vandaele & F. Daerden
School of Physical Sciences, The Open University, Milton Keynes, UK
J. P. Mason & M. R. Patel
Instituto de Astrofìsica de Andalucía/CSIC, Granada, Spain
M. A. López-Valverde
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J.-C.G. and L.S. conceived the study and wrote the paper. Y.W., C.D., I.R.T. and J.P.M. calibrated the UVIS data and prepared the datasets. Observation planning was managed by J.-C.G., L.S., B.R., and M.R.P. A.C.V. is the NOMAD principal investigator, M.R.P. is NOMAD co-principal investigator. All authors contributed to discussion and comments on the paper.
Correspondence to J.-C. Gérard .
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The authors declare no competing interests.
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Nature Astronomy thanks Antonio García Muñoz and Guillaume Gronoff for their contribution to the peer review of this work.
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Gérard, JC., Soret, L., Thomas, I.R. et al. Observation of the Mars O 2 visible nightglow by the NOMAD spectrometer onboard the Trace Gas Orbiter. Nat Astron 8 , 77–81 (2024). https://doi.org/10.1038/s41550-023-02104-8
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🏆 Tennessee wins first-ever title
💪 How the Vols conquered the 2024 MCWS
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🎥 Game 3 highlights
Ncaa.com | june 24, 2024, the college careers of the usa women's basketball team at the 2024 olympics, including awards and stats.
Twelve former college basketball stars descend on Paris this summer with the hopes of winning the United States an eighth consecutive gold medal in women's basketball in the Olympics.
Here's a brief background on all 12 players, including notable stats and achievements from their college basketball careers. All WNBA stats through June 11, 2024.
Team USA roster:
Collier finished her UConn career as one of five Huskies players in the 2,000 points and 1,000 rebounds club, winning the 2016 NCAA title. She was taken No. 6 overall by the Minnesota Lynx in the 2019 WNBA draft and won the gold medal with Team USA in 2020.
School: UConn Years: 2015-19 Career averages: 16.1 ppg, 2.5 apg, 8.1 rpg, 1.5 spg, 1.7 bpg Current WNBA team: Minnesota Lynx WNBA career averages: 17.0 ppg, 2.9 apg, 7.8 rpg, 1.7 spg, 1.2 bpg
College career achievements
Copper finished her college career with the third-most points all time in program history (1,872) at Rutgers. After being drafted No. 7 overall in 2016 by the Washington Mystics, she was then traded to the Chicago Sky. There, she won 2021 WNBA Finals MVP as the team won its first title in franchise history.
School: Rutgers Years: 2012-16 Career averages: 14.1 ppg, 1.3 apg, 5.8 rpg, 1.1 spg, 0.3 bpg Current WNBA team: Phoenix Mercury WNBA career averages: 11.8 ppg, 1.3 apg, 3.6 rpg, 0.6 spg, 0.2 bpg
Gray left Duke as arguably the best player in school history, despite her final two seasons with the Blue Devils marred by injury. Gray's playmaking ability led to her being selected with the 11th pick in the 2014 WNBA draft. Her long professional career has already yielded a 2020 Olympic gold, three WNBA championships and the 2022 WNBA Finals MVP.
School: Duke Years: 2010-14 Career averages: 11.1 ppg, 5.0 apg, 4.4 rpg, 2.7 spg, 0.2 bpg Current WNBA team: Las Vegas Aces WNBA career averages: 12.4 ppg, 5.0 apg, 3.1 rpg, 1.1 spg, 0.2 bpg
Griner compiled one of the most dominant college careers in history in four seasons at Baylor. A two-time Olympic gold medalist, Griner also won a national title in Baylor and a WNBA championship with the Phoenix Mercury.
School: Baylor Years: 2009-13 Career averages: 22.2 ppg, 1.6 apg, 8.8 rpg, 0.5 spg, 5.1 bpg Current WNBA team: Phoenix Mercury WNBA career averages: 17.7 ppg, 1.9 apg, 7.4 rpg, 0.5 spg, 2.7 bpg
The NCAA's all-time leader in triple-doubles will make her Olympic debut for Team USA this summer. Ionescu's four seasons at Oregon were legendary, and led to her selection with the No. 1 pick in the 2020 WNBA draft by the New York Liberty.
School: Oregon Years: 2016-20 Career averages: 18.0 ppg, 7.7 apg, 7.3 rpg, 1.5 spg, 0.3 bpg Current WNBA team: New York Liberty WNBA career averages: 15.9 ppg, 5.8 apg, 5.9 rpg, 0.9 spg, 0.3 bpg
Add Lloyd to the list of players already with an Olympic gold medal on their resume. Prior to winning gold with Team USA in 2020, Loyd was the first overall pick in the WNBA draft in 2015 out of Notre Dame. Loyd's four-year career with the Irish saw two first-team All-American selections as one of the most explosive scorers in college basketball.
School: Notre Dame Years: 2012-15 Career averages: 17.0 ppg, 2.4 apg, 5.7 rpg, 1.4 spg, 0.4 bpg Current WNBA team: Seattle Storm WNBA career averages: 16.7 ppg, 3.2 apg, 3.6 rpg, 1.2 spg, 0.2 bpg
Plum's 57-point senior night broke the NCAA scoring record as part of an illustrious four-year career at Washington. Plum's 3,527 points in her career were the most in NCAA history when she graduated. Plum also set the single season scoring record in 2016-17 with 1,109 points.
School: Washington Years: 2013-17 Career averages: 25.4 ppg, 3.8 apg, 4.3 rpg, 1.4 spg, 0.2 bpg Current WNBA team: Las Vegas Aces WNBA career averages: 13.9 ppg, 4.0 apg, 2.4 rpg, 0.9 spg, 0.1 bpg
UConn's Stewart is arguably the most accomplished player in college basketball history. She was a four-time national champion at UConn and won most outstanding player in the NCAA tournament all four seasons of her college career. Stewart is also a two-time Olympic gold medalist with Team USA.
School: Connecticut Years: 2012-16 Career averages: 17.6 ppg, 2.8 apg, 7.8 rpg, 1.5 spg, 2.7 bpg Current WNBA team: New York Liberty WNBA career averages: 20.7 ppg, 3.1 apg, 8.8 rpg, 1.4 spg, 1.5 bpg
A legend of basketball, Taurasi will compete for her sixth gold medal with Team USA. Taurasi had a legendary career at UConn before taking over pro basketball, with three national championships while playing for Geno Auriemma.
School: Connecticut Years: 2000-04 Career averages: 15.0 ppg, 4.5 apg, 4.4 rpg, 1.2 spg, 1.0 bpg Current WNBA team: Phoenix Mercury WNBA career averages: 19.1 ppg, 4.2 apg, 3.9 rpg, 0.9 spg, 0.6 bpg
After leading Maryland to the Final Four in her final year, Alyssa Thomas was drafted No. 4 overall in 2014. After a draft-day trade to the Connecticut Sun, Thomas has played with the team for her entire WNBA career.
School: Maryland Years: 2010-14 Career averages: 17.5 ppg, 3.6 apg, 9.1 rpg, 1.8 spg, 0.4 bpg Current WNBA team: Connecticut Sun WNBA career averages: 12.4 ppg, 4.3 apg, 7.5 rpg, 1.5 spg, 0.3 bpg
A gold medal, two WNBA championships and an NCAA championship are just a small part of A'Ja Wilson's impressive basketball resume. At South Carolina, Wilson was a three-time consensus first-team All-American and won NCAA tournament MOP in 2017.
School: South Carolina Years: 2014-18 Career averages: 17.3 ppg, 1.4 apg, 8.7 rpg, 1.0 spg, 2.6 bpg Current WNBA team: Las Vegas Aces WNBA career averages: 20.3 ppg, 2.2 apg, 8.8 rpg, 1.1 spg, 1.9 bpg
Young was the leader of Notre Dame's 2018 national championship team as a sophomore guard. After her junior season at Notre Dame, she was selected No. 1 overall in the WNBA Draft.
School: Notre Dame Years: 2016-19 Career averages: 12.4 ppg, 3.5 apg, 6.3 rpg, 1.2 spg, 0.4 bpg Current WNBA team: Las Vegas Aces WNBA career averages: 13.2 ppg, 3.9 apg, 4.0 rpg, 1.1 spg, 0.2 bpg
NCAA Student-Athletes at the 2024 Paris Olympics 🥇🥈🥉
College careers of NCAA student-athletes at 2024 Paris Olympics: 🏀 Basketball: Men's team USA | Women's team USA | Women's 3x3 | Men's 3x3 🏐 Volleyball: U.S. Women's | ⛳️ Golf: USA men's | USA women's 🥇🥈🥉 📺 WATCH: College highlights of former-NCAA Olympians: 🤼♂️ Wrestling: Kyle Dake | Zain Retherford | Aaron Brooks 🏐 Women's volleyball: Kathryn Plummer | Dana Rettke | Avery Skinner 🏀 Men's hoops: Steph Curry | Devin Booker | Anthony Davis 🏀 Women's hoops: Sabrina Ionescu | Kelsey Plum | A'ja Wilson ⛳️ Men's g olf: Scottie Scheffler 🔥History: 2022 NCAA student-athlete Olympic medal winners
March madness.
Di women's basketball news.
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Charles M. Blow
By Charles M. Blow
Opinion Columnist
Last week at a Juneteenth concert on the South Lawn of the White House, Vice President Kamala Harris said that on June 19, 1865, after Union troops arrived in Galveston, Texas, “The enslaved people of Texas learned they were free.” On that day, she said, “they claimed their freedom.”
With those words, Harris, who stood alongside President Biden when he admirably signed the legislation that made Juneteenth a federal holiday, expressed a common oversimplification, one born of our tendency to conjugate history’s complexities: Although it’s a mark of progress to commemorate the end of American slavery, it’s imperative that we continue to underscore the myriad ways in which Black freedom was restricted long after that first Juneteenth.
To start, there is some debate over whether most of the estimated 250,000 enslaved people in Texas at the time didn’t know about the Emancipation Proclamation. As the Harvard professor Henry Louis Gates Jr. told me recently, “I have never met a scholar who believes that’s true.”
But more important, emancipation was not true freedom — not in Texas and not in most of the American South, where a vast majority of Black people lived. It was quasi freedom. It was an ostensible freedom. It was freedom with more strings attached than a marionette.
Most Black people couldn’t claim their freedom on June 19, 1865, because their bodies (and their free will) were still being policed to nearly the same degree and with the same inveterate racism that Southern whites had aimed at them during slavery.
The laws governing the formerly enslaved “were very restrictive in terms of where they could go, what kind of jobs they could have, where they could live in certain communities,” said Daina Ramey Berry, the dean of humanities and fine arts at the University of California, Santa Barbara, and the author of “The Price for Their Pound of Flesh: The Value of the Enslaved, From Womb to Grave, in the Building of a Nation.”
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