An astonishing volume and diversity of evidence is available for many hypotheses in the biomedical and social sciences. Some of this evidence—usually from randomized controlled trials (RCTs)—is amalgamated by meta-analysis. Despite the ongoing debate regarding whether or not RCTs are the ‘gold-standard’ of evidence, it is usually meta-analysis which is considered the best source of evidence: meta-analysis is thought by many to be the platinum standard of evidence. However, I argue that meta-analysis (...) falls far short of that standard. Different meta-analyses of the same evidence can reach contradictory conclusions. Meta-analysis fails to provide objective grounds for intersubjective assessments of hypotheses because numerous decisions must be made when performing a meta-analysis which allow wide latitude for subjective idiosyncrasies to influence its outcome. I end by suggesting that an older tradition of evidence in medicine—the plurality of reasoning strategies appealed to by the epidemiologist Sir Bradford Hill—is a superior strategy for assessing a large volume and diversity of evidence. (shrink)

Emotional intelligence is an emerging field since the 1990s due to its important outcomes for employees. This study is a psychometric meta-analysis examining the links between emotional intelligence and organizational commitment, organizational citizenship behavior, job satisfaction, job performance, and job stress of employees. In this meta-analysis, carefully selected studies on emotional intelligence since the origin of the concept in 1990 were included along with studies examining its outcomes. For this analysis, three streams of emotional intelligence, (...) consistent with previous meta-analyses, were considered: ability, self-report, and mixed emotional intelligence. This meta-analysis is an attempt to add to the literature by analyzing the relationships between emotional intelligence and selected employee outcomes over a period of time beginning in 1990. The three streams of emotional intelligence were separately analyzed to examine their relationship with employee outcomes. These outcomes were included in the study based on select research studies. Our study results showed that emotional intelligence and its three streams were positively related to organizational commitment, organizational citizenship behavior, job satisfaction, and job performance and negatively related to job stress. (shrink)

Emotion Review, Volume 14, Issue 1, Page 66-83, January 2022. To better define the boundaries of conceptually overlapping constructs of intrapersonal emotion knowledge, we examined meta-analytic correlations among five intrapersonal EK-related constructs and attention to emotion. Affect labelling, alexithymia, and emotional clarity were strongly associated, and they were moderately associated with attention to emotion. Alexithymia and emotional awareness were weakly associated, and emotion differentiation was unrelated with emotional clarity. Sample characteristics and measures moderated some of the associations. Publication bias (...) was not found, except for the alexithymia-emotional awareness association. This study helped to clarify the extent to which similarly defined constructs overlap or are distinct, which can inform our decision to adequately label important constructs and employ corresponding measures. (shrink)

Chow's defense of the null-hypothesis significance- test procedure is thoughtful and compelling in many respects. Nevertheless, techniques such as meta-analysis, power analysis, effect size estimation, and confidence intervals can be useful supplements to NHSTP in furthering the cumulative nature of behavioral research, as illustrated by the history of research on the spontaneous recovery of verbal learning.

Meta‐analysis: the glass eye of evidence‐based practice?Meta‐analysis was developed as a technique for combining the results of many different quantitative studies: it is often used to produce quantitative estimates of causal relations and/or association between variables. Meta‐analysis is sometimes regarded as a central component of evidence‐based practice. We draw attention to an incompatibility in the epistemology and methods of reasoning in quantitative meta‐analysis and the epistemology and reasoning implicit in expert practice. We (...) argue that this may be because the common perception of meta‐analysis appeals to truth as correspondence; we suggest that rejecting the naïve realism that underpins truth as correspondence allows meta‐analysis to be understood in terms of truth as coherence. We can then develop an account of meta‐analysis that does not depend upon reduction to a mathematical procedure but is an attempt to maximise coherence in beliefs about what works that is consistent with clinical reasoning in expert practice. (shrink)

Scholars have proposed a number of courses and programs intended to improve the ethical behavior of scientists in an attempt to maintain the integrity of the scientific enterprise. In the present study, we conducted a quantitative meta-analysis based on 26 previous ethics program evaluation efforts, and the results showed that the overall effectiveness of ethics instruction was modest. The effects of ethics instruction, however, were related to a number of instructional program factors, such as course content and delivery (...) methods, in addition to factors of the evaluation study itself, such as the field of investigator and criterion measure utilized. An examination of the characteristics contributing to the relative effectiveness of instructional programs revealed that more successful programs were conducted as seminars separate from the standard curricula rather than being embedded in existing courses. Furthermore, more successful programs were case based and interactive, and they allowed participants to learn and practice the application of real-world ethical decision-making skills. The implications of these findings for future course development and evaluation are discussed. (shrink)

This meta-analysis of 31 studies over 20 years advances our understanding of the gender gap in entrepreneurial bank finance. Findings from previous research on the relationship between entrepreneurs’ gender and bank financing are mixed, which suggests the need to pay particular attention to entrepreneurs’ social context. In this study, we develop a model of how social gender norms explain variation in women entrepreneurs’ (vis-à-vis men entrepreneurs’) access to bank finance. Specifically, we theorize how women’s formal (their nations’ political (...) ideologies) and informal (women’s empowerment) social standing within their societies influence gender discrimination in entrepreneurial bank financing. Consistent with most previous studies, our baseline results show that women entrepreneurs’ business loan applications are rejected to a greater extent than men entrepreneurs’ loan applications. Women entrepreneurs also pay higher interest rates on loans than men entrepreneurs. Further, in societies dominated by a conservative (rather than a liberal) political ideology, the positive relationship between women entrepreneurs and loan interest rates is more positive. Interestingly, gender discrimination in loan rejection and interest rates is magnified in societies with greater women’s empowerment. Taking a social gender-norm perspective, our analysis establishes a gender gap in entrepreneurial bank finance, and we outline an agenda for further research. (shrink)

In evolutionary psychology predictions, women’s mate preferences shift between fertile and nonfertile times of the month to reflect ancestral fitness benefits. Our meta-analytic test involving 58 independent reports (13 unpublished, 45 published) was largely nonsupportive. Specifically, fertile women did not especially desire sex in short-term relationships with men purported to be of high genetic quality (i.e., high testosterone, masculinity, dominance, symmetry). The few significant preference shifts appeared to be research artifacts. The effects declined over time in published work, were (...) limited to studies that used broader, less precise definitions of the fertile phase, and were found only in published research. (shrink)

This study aims to reveal the impact of proactive personality on career success and the sequential mediation effect of organizational citizenship behavior and task performance on the relationship. Utilizing meta-analytic structural equation modeling technology sampling 101,131 employees from multiple organizations and industries, which deeply decreased sampling error, the results indicated slightly different findings of proactive personality and three types of career success. Specifically, in relation to salary, OCB and task performance independently transmit the effects of proactive personality to subjective (...) career success, but they sequentially mediate this link as well. In regard to subjective career success and promotion, OCB mediates the relationship between proactive personality and promotion. OCB and task performance sequentially mediate these links. We discussed findings cautiously and purpose future research directions. (shrink)

In this study bibliometric mapping method was employed to visualise the current research trends and the impact of the two most influential models of working memory, namely: A. D. Baddeley and G. J. Hitch’s multicomponent working memory model and N. Cowan’s embedded-processes model of working memory. Using VOSviewer software two maps were generated based on the index-term words extracted from the research papers citing Baddeley and Cowan, respectively. The maps represent networks of co-occurrences of index terms and can be interpreted (...) as an indication of the main research fields related to the examined models of WM. The results of the analysis revealed that the spheres of influence of the two main conceptualisations of WM are rather different than similar. Although the first two clusters, i.e. “brain mapping” and “higher-level cognition and development” are present in both maps, their relative importance varies. The remaining clusters are unique to each map. Baddeley’s theory seems to have a greater influence on “neuropsychology”, while Cowan’s theory - on basic research on “biological systems”, including the nervous system in humans and animals. The second difference between these theories concerns their relations to functions and dysfunctions associated with particular sensory modalities: in Baddelay’s theory with the “auditory modality” cluster, and in Cowan’s - with the “visual modality” one. (shrink)

My goal in this paper is to see the extent to which judgment aggregation methods subsume meta-analytic ones. To this end, I derive a generalized version of the classical Condorcet Jury Theorem, the aggregative implications of which have been widely exploited in the area of rational choice theory, but not yet in philosophy of science. I contend that the generalized CJT that I prove below is useful for modelling at least some meta-analytic procedures.

Recent research highlights the relationship between perceived brand ethicality (PBE), consumer purchase intention, and the consumer–brand relationship. Existing empirical studies offer mixed findings on whether these three relate positively, negatively, or not at all. Moreover, their relationships have not been the primary focus of existing meta-analytic reviews. Therefore, we conducted a meta-analysis to provide an empirical consensus to this debate by studying the magnitude of the association between PBE and consumer responses (purchase intention, brand trust, and brand (...) loyalty). Moreover, we examined the moderating effects of self-accountability and brand experience to expand our understanding of this relationship. After a thorough literature review from major databases and cross-referencing of the relevant articles, we selected 31 peer-reviewed articles for this meta-analysis. The results reveal that consumer response to PBE positively influences attitude formation towards the brand and purchase intentions. Additionally, moderation analyses reveal the crucial roles of self-accountability and brand experience in influencing the effects of PBE on consumer–brand relationships and purchase intention. Crucial theoretical and practical implications are discussed regarding these relationships, followed by limitations and future research directions. (shrink)

The “erasing race” effect is the reduction of the salience of “race” as an alliance cue when recalling coalition membership, once more accurate information about coalition structure is presented. We conducted a random-effects model meta-analysis of this effect using five United States studies (containing nine independent effect sizes). The effect was found (ρ = 0.137, K = 9, 95% CI = 0.085 to 0.188). However, no decline effect or moderation effects were found (a “decline effect” in this context (...) would be a decrease in the effect size over time). Furthermore, we found little evidence of publication bias. Synthetically correcting the effect size for bias stemming from the use of an older method for calculating error base rates reduced the magnitude of the effect, but the it remained significant. Taken together, these findings indicate that the “erasing race” effect generalizes quite well across experimental contexts and would, therefore, appear to be quite robust. We reinterpret the theoretical basis for these effects in line with Brunswikian evolutionary-developmental theory and present a series of predictions to guide future research in this area. (shrink)

Philosophical work on meta-analysis focuses on biomedical research and revolves around the question: Is meta-analytic evidence the best kind of evidence? By focusing on conservation science rather than biomedical science, I identify further questions and puzzles for meta-analysis and show their importance for the epistemology of meta-analysis.

(1997). Significant redefinitions: A meta‐analysis of aspects of recent developments in initial teacher education in England and Wales. Educational Philosophy and Theory: Vol. 29, No. 2, pp. 102-118. doi: 10.1111/j.1469-5812.1997.tb00023.x.

E-learning has gained popularity since the outbreak of COVID-19. This study aims to identify gender differences in e-learners' self-efficacy, satisfaction, motivation, attitude, and performance across the world. Through a meta-analysis and systematic review, this study concludes that there are generally no significant gender differences in e-learning outcomes except in a few countries. Females significantly outperformed males in Spain and the UK. In Austria, India, and mixed countries, females hold significantly more positive attitudes toward e-learning than males. In the (...) USA, females present significantly higher self-efficacy than males. Future research into the gender issue in e-learning across the world may adopt cross-disciplinary research methods except for a meta-analysis. (shrink)

The biophilia hypothesis posits an innate biological and genetic connection between human and nature, including an emotional dimension to this connection. Biophilic design builds on this hypothesis in an attempt to design human-nature connections into the built environment. This article builds on this theoretical framework through a meta-analysis of experimental studies on the emotional impacts of human exposure to natural and urban environments. A total of 49 studies were identified, with a combined sample size of 3,201 participants. The (...) primary findings indicated that exposure to natural environments had a medium to large effect on both increasing positive affect and decreasing negative affect. This finding supported the anticipated emotional dimension of the biophilia hypothesis and lends credibility to biophilic design theory. Evidence was revealed in support of the affective/arousal response model. Immersion in environments indicated a larger effect size than laboratory simulation of environments. Methodological recommendations for future experimental research were few, however the Positive and Negative Affect Schedule outcome measure was recommended as a measure of both positive and negative affect for further studies. A combination measurement of stress related outcome variables was proposed to further explore the affective/arousal response model and its potential relationship to the biophilia hypothesis. The meta-analysis provides evidence for fundamental theories regarding human-nature connection, while revealing gaps in current knowledge. (shrink)

Emotional clarity and attention to emotions represent the extent to which people understand and attend to their own emotions, respectively, and are broad facets of emotional awareness, alexithymia, and emotional intelligence. To examine the extent to which these two constructs are associated, we conducted a meta-analysis of studies including well-validated self-report measures of trait clarity and attention to emotion. Clarity and attention were moderately, positively associated. Assessment instrument, but not sample gender or age, moderated the association between clarity (...) and attention. Analyses of between-study heterogeneity and publication bias suggested that results were valid and generalizable. We discuss potential causes of the association between clarity and attention, and elaborate on the implications of our results for emotion regulation, well-being, and psychopathology. (shrink)

Computational models of child language development can help us understand the cognitive underpinnings of the language learning process, which occurs along several linguistic levels at once (e.g., prosodic and phonological). However, in light of the replication crisis, modelers face the challenge of selecting representative and consolidated infant data. Thus, it is desirable to have evaluation methodologies that could account for robust empirical reference data, across multiple infant capabilities. Moreover, there is a need for practices that can compare developmental trajectories of (...) infants to those of models as a function of language experience and development. The present study aims to take concrete steps to address these needs by introducing the concept of comparing models with large-scale cumulative empirical data from infants, as quantified by meta-analyses conducted across a large number of individual behavioral studies. We formalize the connection between measurable model and human behavior, and then present a conceptual framework for meta-analytic evaluation of computational models. We exemplify the meta-analytic model evaluation approach with two modeling experiments on infant-directed speech preference and native/non-native vowel discrimination. (shrink)

This paper presents a series of meta-analyses of the validity of general mental ability (GMA) for predicting five occupational criteria, including supervisory ratings of job performance, production records, work sample tests, instructor ratings, and grades. The meta-analyses were conducted with a large database of 467 technical reports of the validity of the General Aptitude Test Battery (GATB) which included 630 independent samples. GMA showed to be a consistent predictor of the five criteria, but the magnitude of the operational (...) validity was not the same across the five criteria. Results also showed that job complexity is a moderator of the GMA validity for the performance criteria. We also found that the GMA validity estimates are slightly smaller than the previous ones obtained by Hunter (1983a; Hunter & Hunter, 1984). Finally, we discuss the implications of these findings for the research and practice of personnel selection. (shrink)

ObjectiveThe objective of this paper is to evaluate the cognitive benefit of exercise after stroke, so as to provide more accurate and reliable guidance for targeted exercise intervention. Methods. Randomized controlled trials of the relationship between exercise and cognition after stroke were identified in Cochrane Library and PubMed. Methodological quality was assessed using the Cochrane tool of bias. SMD and 95% confidence intervals were calculated, and Chi-squared test was adopted to estimate the heterogeneity. Results. Twenty-three studies met inclusion criteria, including (...) 1528 participants. Heterogeneity was from low to high such as attention, executive function, cognition, and working memory. The overall effect on cognition was small but significant and there is a difference between cognitive domains in attention, executive function, and working memory. Exercise training was less effective before the 18th month after stroke. Higher benefits on cognition were found after combined therapy compared with other exercise programs, and the older the stroke survivors, the less the cognitive benefit of exercise. Conclusion. Small-to-moderate effect of exercise on cognitive benefit after stroke was found, and the effect was moderated by treatment protocols and sample characteristics. (shrink)

This article presents a meta-analysis of the validity of cognitive reflection (CR) for predicting job performance and training proficiency. It also examines the incremental validity of CR over cognitive intelligence (CI) for predicting these two occupational criteria. CR proved to be an excellent predictor of job performance and training proficiency, and the magnitude of the true validity was very similar across the two criteria. Results also showed that the type of CR is not a moderator of CR validity. (...) We also found that CR showed incremental variance over CI for the explanation of job performance, although the magnitude of the contribution is small. However, CR shows practically no incremental validity over CI validity in the explanation of training proficiency. Finally, we discuss the implications of these findings for the research and practice of personnel selection. (shrink)

OBJECTIVES: This reliability generalization study aimed to estimate the mean and variance of the interrater reliability coefficients (ryy) of supervisory ratings of overall, task, contextual, and positive job performance. The moderating effect of the appraisal purpose and the scale type was examined. It was hypothesized that the ratings collected for research purposes and multi-item scales have higher ryy. It was also examined whether ryy was similar for the four performance dimensions. METHOD: A database consisting of 224 independent samples was created (...) and hierarchical sub-grouping meta-analyses were conducted. RESULTS: The appraisal purpose was a moderator of ryy for the four performance dimensions. Scale type was a moderator of ryy for overall and task performance collected for research purposes. The findings also suggest that supervisors seem to have less difficulty evaluating overall job performance than task, contextual, and positive performance. The best estimates of the observed ryy for overall job performance are.61 for research-collected ratings and.45 for administrative-collected ratings. MAIN CONCLUSIONS: (1) Appraisal purpose moderates ryy and researchers and practitioners should be aware of its effects before collecting ratings or using empirically-derived interrater reliability distributions, (2) Scale type seems to moderate ryy in the case of the ratings collected for research purposes, only, (3) overall job performance is more reliably rated than task, contextual, and positive performance. Implications for research and practice are discussed. (shrink)

Mental contrasting with implementation intentions is a self-regulation strategy that enhances goal attainment. This meta-analysis evaluated the efficacy of MCII for goal attainment and explored potential moderators. A total of 21 empirical studies with 24 independent effect sizes were included in the analysis. Results showed that MCII to be effective for goal attainment with a small to medium effect size. The effect was mainly moderated by intervention style. Specifically, studies with interventions based on interactions between participants and (...) experimenters had stronger effects than studies with interventions based on interactions between participants and documents. The results revealed that MCII is a brief and effective strategy for goal attainment with a small to moderate effect; however, because of some publication bias, the actual effect sizes may be smaller. Due to small number of studies in this meta-analysis, additional studies are needed to determine the role of moderator variables. (shrink)

Lloyd (2011) presents highly suggestive results regarding the specificity of the link between particular brain areas and cognitive tasks. Some of his evidence is derived from the analysis of data from the BrainMap database (available: www.brainmap.org), which has become a fundamental resource for the conduct of functional neuroimaging meta-analysis. In the present note, some observations regarding the possibilities and pitfalls of meta-analysis of functional neuroimaging data are given as a complement to Lloyd's excellent exposition of (...) the topic. Additionally, some comments are made on the particular meta-analytic results presented by Lloyd.Functional neuroimaging studies usually present their findings in the form .. (shrink)

This article presents a meta-analysis of the impact of minimal exposure to affective stimuli on the emergence of enduring conscious affective feelings. Theories often assume that such affective feelings are linked to automatic appraisals of events (i.e. in the absence of an evaluative processing goal). However, few studies have tested this hypothesis. Moreover, they have provided divergent results. We propose a meta-analysis of these studies to get a clearer picture on this issue. The meta-analysis (...) includes 22 studies (37 effect sizes; combined N = 2159) in which participants were repeatedly exposed to affective stimuli in the absence of an evaluative processing goal before their mood was measured. In this analysis, we focused on the type of stimulus presentation (i.e. visible vs. masked) as well as on the type of stimulus (i.e. faces, pictures, words). The results indicate that the effect of a stimulus is moderated by the visibility of the stimuli. Repeated exposure to visible stimuli leads to congruency effects (i.e. positive stimuli lead to positive feelings), whereas exposure to masked stimuli leads to contrast effects (i.e. positive stimuli lead to negative feelings). Moreover, these effects seem to be restricted to some types of stimuli, with no detectable effects of emotional faces. (shrink)

Although there exist numerous publications on job and task rotation from various disciplines, there is no consistent evidence of their effectiveness. Drawing on theories from industrial and organizational psychology, knowledge management, ergonomics, and management science, we meta-analytically investigated relationships between job/task rotation and employee attitudes, learning and development, psychological and physical health, and organizational performance. Due to a conceptual overlap and frequent confusion of terminology, we analyzed the design of the rotation (job rotation vs. task rotation) as a possible (...) moderator. The three-level meta-analysis on 56 studies (N= 284,086) showed that rotation was significantly associated with job satisfaction (r= 0.27), organizational commitment (r= 0.16), career success (r= 0.31), labor flexibility (r= 0.32), general psychological health (r= 0.20), stress/burnout (r= −0.13), individual performance (r= 0.13), and productivity (r= 0.13). Positive relationships between rotation and physical health could only be found when rotation was compared to high-intensity work. Task rotation yielded stronger relationships with attitudinal outcomes, job rotation with learning and development, psychological health, and organizational performance outcomes. Further moderator analyses showed that individualism decreased relationships between task rotation and attitudes, and correlations with organizational performance and physical health were stronger for subjective measures. The findings indicate that many expectations toward job and task rotation are not fully supported. (shrink)

This meta-analysis synthesizes quantitative findings of the gender differences in moral sensitivity retrieved from 19 primary studies. We found the average effect size of 0.25, favoring women, with a standard deviation of 0.14. The variation in the observed effect sizes could not be attributed to differences in participants' educational level, the utilized measure of moral sensitivity, or the publication format in which the study was reported. This suggests that gender differences in moral sensitivity are consistent across different levels (...) of participants' education regardless of the instrument used to assess moral sensitivity or the format in which the research was reported. (shrink)

Are there relationships between consciousness and the material world? Empirical evidence for such a connection was reported in several meta-analyses of mind-matter experiments designed to address this question. In this paper we consider such meta-analyses from a statistical modeling perspective, emphasizing strategies to validate the models and the associated statistical procedures. In particular, we explicitly model increased data variability and selection mechanisms, which permits us to estimate 'selection profiles ' and to reassess the experimental effect in view of (...) potential other effects. An application to the data pool considered in the influential meta-analysis of Radin and Nelson (1989) yields indications for the presence of random and selection effects Adjustment for possible selection is found to render the,without such an adjustment significant, experimental effect non-significant. Somewhat different conclusions apply to a subset of the data deserving separate consideration. The actual origin of the data features that are described as experimental, random, or selection effects within the proposed model cannot be clarified y our approach and remains open. (shrink)

Based on research on the increasingly popular unconscious thought effect (UTE), it has been suggested that physicians might make better diagnostic decisions after a period of distraction than after an equivalent amount of time of conscious deliberation. However, published attempts to demonstrate the UTE in medical decision making have yielded inconsistent results. In the present study, we report the results of a meta-analysis of all the available evidence on the UTE in medical decisions made by expert and novice (...) clinicians. The meta-analysis failed to find a significant contribution of unconscious thought to the accuracy of medical decisions. This result cannot be easily attributed to any of the potential moderators of the UTE that have been discussed in the literature. Furthermore, a Bayes Factor analysis shows that most experimental conditions provide positive support for the null hypothesis, suggesting that these null results do not reflect a simple lack of statistical power. We suggest ways in which new studies could usefully provide further evidence on the UTE. Unless future research shows otherwise, the recommendation of using unconscious thought to improve medical decisions lacks empirical support. (shrink)

A meta-analysis of 190 cross-cultural emotion studies, published between 1967 and 2000, was performed to examine (1) to what extent reported cross-cultural differences in emotion variables could be regarded as valid (substantive factors) or as method-related (statistical artefacts, cultural bias), and (2) which country characteristics could explain valid cross-cultural differences in emotion. The relative contribution of substantive and method-related factors at sample, study, and country level was investigated and country-level explanations for differences in emotions were tested. Results indicate (...) that a correction for statistical artefacts and method-related factors reduced the observed cross-cultural effect sizes considerably. After controlling for valence (positive vs. negative emotions) and kind of study (self-report vs. recognition studies), the remaining cross-cultural variance was associated with subsistence mode, political system, values, and religiosity. Values explained more variance than did ecological or sociopolitical variables. It was concluded that both method-related factors (13.8% of variance explained) and culture-level factors (27.9% of variance explained) underlie observed cross-cultural differences. (shrink)

This meta-analysis examines the relationship between materialism and subjective wellbeing in the Chinese population. Fifty-six relevant studies covering the period from 1998 to 2022 were included in the meta-analysis. Fifty-eight independent effect sizes from a total of 52,368 participants were obtained to calculate the mean effect sizes. Materialistic values correlated with significantly lower subjective wellbeing, while the mean effect size for extrinsic aspirations was found to be not significant. The effect sizes varied across different types of (...) wellbeing outcomes. The associations were also moderated by certain demographic factors, methodological factors, publication features, and economic indicators. We discuss our limitations and the implications for future research. (shrink)

The COVID-19 is creating panic among people around the world and is causing a huge public mental health crisis. Large numbers of observational studies focused on the prevalence of psychological problems during the COVID-19 pandemic were published. It is essential to conduct a meta-analysis of the prevalence of different psychological statuses to insight the psychological reactions of general population during the COVID-19 epidemic in China. Sixty six observational studies about the psychological statuses of people during the COVID-19 were (...) included, searching up to 1 December 2020. Strengthening the Reporting of Observational Studies in Epidemiology (STROBE) was used to evaluate the quality of the included studies. OpenMeta[Analyst] was used for the data analysis. High prevalence of acute stress and fear symptoms were observed in the early period of the epidemic. Additionally, anxiety and depression symptoms continued at a high prevalence rate during the epidemic. It should alert the lasting mental health problems and the risk of post-traumatic stress disorder and other mental disorders.Systematic Review Registration:PROSPERO CRD 42020171485. (shrink)