A meta-analysis of neurocognition in youth with familial high risk for bipolar disorder

2017 ◽  
Vol 44 ◽  
pp. 17-23 ◽  
Author(s):  
E. Bora ◽  
A. Özerdem
Keyword(s):  
Bipolar Disorder ◽  
Social Cognition ◽  
High Risk ◽  
Cognitive Deficits ◽  
Verbal Memory ◽  
Visual Memory ◽  
Meta Analysis ◽  
Cognitive Domains ◽  
Significant Difference ◽  
Neurodevelopmental Abnormalities

AbstractObjective:Neuropsychological impairment, including deficits in social cognition is evident in subjects at genetic high-risk for psychosis. However, findings in youth at genetic risk to bipolar disorder (BP) have been suggested to be less supportive of premorbid deficits. We aimed to conduct a meta-analysis of cognitive deficits in youth with familiar risk for bipolar disorder (FHR-BD).Methods:A novel meta-analysis of FHR-BD (mean age 10–25), including 18 studies (786 offsprings/siblings of patients with BD and 794 healthy controls), was conducted.Results:Both general cognition (d = 0.29, CI = 0.15–0.44) and social cognition (d = 0.23, CI = 0–0.45) were impaired in FHR-BD. In comparison to controls, FHR-BD had significant deficits in several cognitive domains, including visual memory (d = 0.35), verbal memory (d = 0.21), processing speed (d = 0.26) and sustained attention (d = 0.36). There was no significant difference between FHR-BD and controls in planning and working memory.Conclusions:Cognitive deficits are evident in individuals who are at genetic high-risk for developing BD. Neurodevelopmental abnormalities are likely playing a role not only in schizophrenia but also in BD.

scholarly journals M49. BEHAVIOURAL SOCIAL COGNITION IN SCHIZOPHRENIA SPECTRUM DISORDERS IN COMPARISON TO AUTISM SPECTRUM DISORDER: A SYSTEMATIC REVIEW AND META-ANALYSIS

2020 ◽  
Vol 46 (Supplement_1) ◽  
pp. S152-S153
Author(s):  
Lindsay Oliver ◽  
Iska Moxon-Emre ◽  
Aristotle Voineskos ◽  
Stephanie Ameis
Keyword(s):  
Social Cognition ◽  
Cognitive Deficits ◽  
Social Cognitive ◽  
Meta Analysis ◽  
Autism Spectrum ◽  
Effect Sizes ◽  
Significant Difference ◽  
Social Cognitive Deficits ◽  
Meta Analyses ◽  
The Mind

Abstract Background Schizophrenia spectrum disorders (SSDs) and autism spectrum disorder (ASD) both feature social cognitive deficits, which are highly debilitating. These include lower-level processes (e.g. emotion recognition), thought to be subserved by a frontoparietal mirroring network, and higher-level mentalizing processes (e.g. theory of mind), involving cortical midline and lateral temporal brain regions. Across both disorders, impairments in social cognition persist over time, drive disability, and predict functional outcome. Overlapping symptoms in SSDs and ASD have long been recognized, particularly in the realm of social deficits. However, despite some studies including both individuals with SSDs and ASD showing similar levels of social cognitive impairment, including lower-level and higher-level deficits, results are mixed. Thus, our objective was to determine based on the extant literature how deficits in social cognition diverge or overlap between individuals with SSDs and ASD by conducting a systematic review and meta-analysis of studies directly comparing these groups on behavioural social cognitive measures. Methods Literature searches were conducted in MEDLINE, Embase, PsycINFO, and Web of Science to identify articles that utilized behavioural measures to assess social cognition in both SSD and ASD samples. Of 3682 articles identified, 28 met all inclusion criteria. Across the accepted articles, lower-level (e.g. facial and/or context-embedded emotion recognition) and higher-level (e.g. intention understanding, perspective taking) social cognitive measures were identified, and random-effects meta-analyses were conducted for each category. A separate meta-analysis was also conducted for the Reading the Mind in the Eyes test given that it was the most commonly used social cognitive metric. Effect sizes were estimated using Hedges’ g. Homogeneity of effects and publication bias were also assessed for each meta-analysis. Results A significant difference in lower-level social cognitive performance was found between individuals with SSDs and ASD, with the SSD group performing better than the ASD group (Hedges’ g = 0.30, 95% CI [0.05, 0.56], p = .018). In contrast, there was no significant difference in higher-level social cognitive performance between SSD and ASD groups (Hedges’ g = -0.14, 95% CI [-0.52, 0.24], p = .46). Similarly, the Reading the Mind in the Eyes test meta-analysis revealed no significant difference in effect sizes between disorders (Hedges’ g = 0.24, 95% CI [-0.07, 0.55], p = .14). Effect size distributions were significantly heterogeneous in all three cases (all p < .001). Discussion Based on meta-analyses of the extant literature, both shared and differential social cognitive deficits may be present between individuals with SSDs and ASD. Though no differences were detected between SSD and ASD groups on higher-level social cognitive tasks or the Reading the Mind in the Eyes test, lower-level social cognitive deficits were found to be more severe in individuals with ASD than SSDs. Notably, the majority of studies included in the meta-analyses had small sample sizes, and heterogeneity of effect sizes was apparent. Thus, studies including larger sample sizes and validated measures of social cognition in conjunction with other methodologies are needed to substantiate these results, and better understand the shared and unique behavioural underpinnings and associated neural circuit abnormalities underlying social cognitive deficits in SSDs and ASD.

scholarly journals Structural brain correlates of cognitive function in schizophrenia: a meta-analysis

2021 ◽  
Author(s):  
Marianne Khalil ◽  
Philippine Hollander ◽  
Delphine Raucher-Chene ◽  
Martin Lepage ◽  
Katie M. Lavigne
Keyword(s):  
Executive Function ◽  
Social Cognition ◽  
Brain Structure ◽  
Network Architecture ◽  
Visual Memory ◽  
Meta Analysis ◽  
Brain Networks ◽  
Brain Regions ◽  
Cognitive Domains ◽  
Structural Brain

Schizophrenia is characterized by cognitive impairments and widespread structural brain alterations (e.g., decreased volume, thickness, surface area). Brain structure-cognition associations have been extensively studied in schizophrenia, typically involving individual cognitive domains or brain regions of interest. Findings in overlapping and diffuse brain regions may point to structural alterations in large-scale brain networks. We performed a systematic review and meta-analysis examining whether brain structure-cognition associations can be explained in terms of biologically meaningful brain networks. Of 7,621 screened articles, 88 were included in a series of meta-analyses assessing publication bias, heterogeneity, and study quality. Significant associations were found between overall brain structure and eight cognitive domains (speed of processing, attention/vigilance, working/verbal/visual memory, executive function, social cognition, and verbal fluency). Brain structure within functionally defined networks (default, dorsal/ventral attention, frontoparietal, limbic, somatosensory, visual) and external structures (amygdala, hippocampus, and cerebellum) typically showed associations with conceptually related cognitive domains, with higher-level domains (e.g., executive function, social cognition) associated with more networks. These findings suggest brain structure-cognition associations in schizophrenia may follow network architecture.

scholarly journals The Effect of Curcumin Differs on Individual Cognitive Domains across Different Patient Populations: A Systematic Review and Meta-Analysis

2021 ◽  
Vol 14 (12) ◽  
pp. 1235
Author(s):  
I-Chen Tsai ◽  
Chih-Wei Hsu ◽  
Chun-Hung Chang ◽  
Ping-Tao Tseng ◽  
Ke-Vin Chang
Keyword(s):  
Working Memory ◽  
Placebo Group ◽  
Cognitive Function ◽  
Processing Speed ◽  
Verbal Memory ◽  
Meta Analysis ◽  
Visual Learning ◽  
Clinical Effectiveness ◽  
Cognitive Domains ◽  
Significant Difference

Curcumin is a polyphenol with strong antioxidant and anti-inflammatory effects that has been shown to be effective in ameliorating cognitive decline in animal studies. However, its clinical effectiveness is inconclusive, and relevant gastrointestinal adverse events (AEs) have been reported. The aim of this meta-analysis was to summarize the existing evidence from randomized controlled trials (RCTs) of effects of curcumin on overall cognitive function, individual cognitive domains, and gastrointestinal AE. The study includes 8 RCTs and 389 participants. A random-effects model was used for the meta-analysis. Compared with the placebo group, the curcumin group was associated with an improvement in working memory (Hedges’ g = 0.396, 95% confidence interval (CI) = 0.078 to 0.714, p = 0.015) and a borderline benefit in processing speed (Hedges’ g = 0.303, 95% CI = ‒0.013 to 0.619, p = 0.06). In the domains of language, episodic memory/visual learning, verbal memory, cognitive flexibility/problem solving, and overall cognitive function, no significant difference existed for the comparison between the curcumin and placebo groups. The curcumin group had a significantly higher risk of gastrointestinal AEs than the placebo group (odds ratio = 3.019, 95% CI = 1.118 to 8.150, p = 0.029). In the future, the effects of curcumin on working memory, processing speed, and gastrointestinal AE should be further investigated.

Associations between cognition in parents with schizophrenia or bipolar disorder and their 7-year old high-risk offspring

2017 ◽  
Vol 41 (S1) ◽  
pp. s813-s813
Author(s):  
A.N. Greve ◽  
J.R.M. Jepsen ◽  
V. Bliksted ◽  
E.L. Rasmussen ◽  
D. Gantriis ◽  
...  
Keyword(s):  
Bipolar Disorder ◽  
Cognitive Impairment ◽  
Social Cognition ◽  
High Risk ◽  
Cognitive Functioning ◽  
Verbal Memory ◽  
Cognitive Impairments ◽  
Risk And Resilience ◽  
Birth Cohorts ◽  
Competing Interest

IntroductionNeurocognitive and social cognitive impairments are central characteristics of schizophrenia and, to a lesser extent, of bipolar disorder. Birth cohorts and familial high risk studies have described cognitive impairments in subjects before onset of diagnosis as well as in children with increased genetic risk for development of the disorders.ObjectivesTo our knowledge, this is the first study to investigate the correlations between neurocogntion and social cognition in parents and offspring simultaneously and with the same methodology. We will divide the parents into subgroups (cognitive impairment and good cognitive functioning) and use these subgroups to describe correlations with their offspring. Identifying associations between parents and offspring can add important clues to risk factors for schizophrenia and bipolar disorder and, on the long-term, help the development of more effective and potentially preventive treatments.MethodsThis study is part of the Danish high risk and resilience study–VIA7. The VIA7 cohort consists of 522 children age 7 with zero, 1 or 2 parents diagnosed with schizophrenia or bipolar disorder and both of their biological parents. We assessed neurocognition and social cognition with a comprehensive test battery including: intelligence (RIST), executive functions (WAIS-IV, D-KEFS, CANTAB), verbal memory (TOMAL2), attention, emotion recognition, decision making and response control (CANTAB), theory of mind (animated triangles) and social perception (TASIT). Parental subgroups were based on the 95% CI of the controls (cognitive impairment < 95%CI and good cognitive functioning > 95% CI).ResultsData analysis is ongoing and results will be presented at the conference.Disclosure of interestThe authors have not supplied their declaration of competing interest.

scholarly journals M115. COGNITIVE FUNCTION IN BIPOLAR AND SCHIZOPHRENIA OFFSPRING: FINDINGS ACROSS THE NEURODEVELOPMENTAL CONTINUUM

2020 ◽  
Vol 46 (Supplement_1) ◽  
pp. S178-S179
Author(s):  
Isabel Valli ◽  
Elena De la Serna ◽  
Roger Borras ◽  
Ilzarbe Daniel ◽  
Inmaculada Baeza ◽  
...  
Keyword(s):  
Bipolar Disorder ◽  
Cognitive Impairment ◽  
Cognitive Function ◽  
High Risk ◽  
Visual Memory ◽  
Healthy Controls ◽  
Cognitive Domains ◽  
Intact Group ◽  
Cognitively Intact ◽  
Selective Impairment

Abstract Background Neurocognitive impairment is considered to lie on a continuum of severity across schizophrenia (SZ) and bipolar disorder (BP), possibly reflecting a continuum of neurodevelopmental load. Due to the known heterogeneity, performance patterns across both disorders have been examined using clustering approaches, which previously identified subgroups with different levels of impairment, from none to widespread and severe. We, for the first time, used this approach to examine cognitive function in children and youth at familial risk of developing SZ and BP, in order to investigate cognitive profiles earlier on in the neurodevelopmental pathway. Methods 220 participants, 49 offspring of individuals with schizophrenia (SZO), 90 offspring of individuals with bipolar disorder (BPO) and 81 healthy controls (HC), underwent a comprehensive cognitive assessment. Measures of attention, verbal memory, visual memory, executive function, working memory, and processing speed were used to group high-risk offspring. The k-means clustering with elbow method was used to determine the optimal number of clusters. High-risk offspring were then each assigned to a specific cluster. Cognitive performance within each of the clusters was compared to that of HC in order to describe the distribution of impairments across different cognitive domains and their severity. Between–cluster comparisons were then performed in terms of clinical and functioning variables. Results Three cognitive subgroups were identified for high-risk offspring: a global impairment group (19.5%) with severe impairments across most cognitive domains, a selective impairment group (46%) with moderate deficits across specific domains, and a cognitively intact group (34.5%) with performance comparable to that of healthy controls. Both SZO and BPO were represented in each of the three clusters. However a larger proportion of the SZO (30.6%) than of the BPO (13.3%) were characterised by widespread cognitive dysfunction, whereas BPO (41.1%) were more frequently cognitively spared relative to SZO (22.4%). Individuals in the global cognitive impairment group displayed significantly poorer clinical and functioning measures relative to the other two clusters. Discussion Three cognitive subgroups were identified in BP and SZ offspring, a global impairment group, a selective impairment group and a cognitively intact group. The clustering pattern identified overlaps with that previously observed after illness onset. Findings are in line with the known heterogeneity in cognitive impairment across SZ and BP and can contribute to elucidate the timeframe of its emergence. Using cognitive function as a proxy measure of neurodevelopmental load, the findings point to a gradient in individuals at genetic risk of SZ and BP. They have therefore important implications for the understanding of potentially different neurodevelopmental trajectories within SZ and BP, hence for patient stratification in research and clinical practice.

Sensitivity of cognitive tests in four cognitive domains in discriminating MDD patients from healthy controls: a meta-analysis

2013 ◽  
Vol 25 (9) ◽  
pp. 1543-1557 ◽  
Author(s):  
JaeHyoung Lim ◽  
In Kyung Oh ◽  
Changsu Han ◽  
Yu Jeong Huh ◽  
In-Kwa Jung ◽  
...  
Keyword(s):  
Verbal Memory ◽  
Verbal Fluency ◽  
Visual Memory ◽  
Meta Analysis ◽  
Cochrane Library ◽  
Cognitive Tests ◽  
Healthy Controls ◽  
Cognitive Domains ◽  
Depressed Patients ◽  
Healthy Participants

ABSTRACTBackground: We performed a meta-analysis in order to determine which neuropsychological domains and tasks would be most sensitive for discriminating between patients with major depressive disorder (MDD) and healthy controls.Methods: Relevant articles were identified through a literature search of the PubMed and Cochrane Library databases for the period between January 1997 and May 2011. A meta-analysis was conducted using the standardized means of individual cognitive tests in each domain. The heterogeneity was assessed, and subgroup analyses according to age and medication status were performed to explore the sources of heterogeneity.Results: A total of 22 trials involving 955 MDD patients and 7,664 healthy participants were selected for our meta-analysis. MDD patients showed significantly impaired results compared with healthy participants on the Digit Span and Continuous Performance Test in the attention domain; the Trail Making Test A (TMT-A) and the Digit Symbol Test in the processing speed domain; the Stroop Test, the Wisconsin Card Sorting Test, and Verbal Fluency in the executive function domain; and immediate verbal memory in the memory domain. The Finger Tapping Task, TMT-B, delayed verbal memory, and immediate and delayed visual memory failed to separate MDD patients from healthy controls. The results of subgroup analysis showed that performance of Verbal Fluency was significantly impaired in younger depressed patients (<60 years), and immediate visual memory was significantly reduced in depressed patients using antidepressants.Conclusions: Our findings have inevitable limitations arising from methodological issues inherent in the meta-analysis and we could not explain high heterogeneity between studies. Despite such limitations, current study has the strength of being the first meta-analysis which tried to specify cognitive function of depressed patients compared with healthy participants. And our findings may provide clinicians with further evidences that some cognitive tests in specific cognitive domains have sensitivity to discriminate MDD patients from healthy controls.

Investigating cognitive deficits and symptomatology across pre-morbid adjustment patterns in first-episode psychosis

2009 ◽  
Vol 40 (5) ◽  
pp. 749-759 ◽  
Author(s):  
L. Béchard-Evans ◽  
S. Iyer ◽  
M. Lepage ◽  
R. Joober ◽  
A. Malla
Keyword(s):  
Cognitive Impairment ◽  
Cognitive Deficits ◽  
Verbal Memory ◽  
Visual Memory ◽  
First Episode Psychosis ◽  
First Episode ◽  
Cognitive Domains ◽  
Good Group ◽  
Episode Psychosis ◽  
Poor Group

BackgroundCognitive deficits in schizophrenia are well established and are known to be present during the first episode of a psychotic disorder. In addition, consistent heterogeneity within these impairments remains unexplained. One potential source of variability may be the level of pre-morbid adjustment prior to the onset of first-episode psychosis (FEP).MethodNinety-four FEP patients and 32 healthy controls were assessed at baseline on several neuropsychological tests comprising six cognitive domains (verbal memory, visual memory, working memory, processing speed, reasoning/problem-solving and attention) and an abbreviated version of the full IQ. A global neurocognitive domain was also computed. Pre-morbid adjustment patterns were divided into three distinct groups: stable-poor, stable-good and deteriorating course.ResultsBased on a cut-off of 0.8 for effect size, the stable-poor pre-morbid adjustment group was significantly more impaired on most cognitive domains and full IQ compared to the deteriorating group, who were more severely impaired on all measures compared to the stable-good group. The type of cognitive deficit within each subgroup did not differ and the results indicate that a global neurocognition measure may reliably reflect the severity of cognitive impairment within each subgroup.ConclusionsPre-morbid adjustment patterns prior to onset of psychosis are associated with severity but not type of cognitive impairment. Patients in the stable-poor group are generally more impaired compared to the deteriorating group, who are, in turn, more impaired than the stable-good group.

scholarly journals Social Cognition, Language, and Social Behavior in 7-Year-Old Children at Familial High-Risk of Developing Schizophrenia or Bipolar Disorder: The Danish High Risk and Resilience Study VIA 7—A Population-Based Cohort Study

2019 ◽  
Vol 45 (6) ◽  
pp. 1218-1230 ◽  
Author(s):  
Camilla Jerlang Christiani ◽  
Jens R M Jepsen ◽  
Anne Thorup ◽  
Nicoline Hemager ◽  
Ditte Ellersgaard ◽  
...  
Keyword(s):  
Bipolar Disorder ◽  
Social Cognition ◽  
Social Behavior ◽  
High Risk ◽  
Social Functioning ◽  
Population Based ◽  
Social Responsiveness ◽  
Developmental Phase ◽  
Bonferroni Correction ◽  
Familial High Risk

Abstract Objective To characterize social cognition, language, and social behavior as potentially shared vulnerability markers in children at familial high-risk of schizophrenia (FHR-SZ) and bipolar disorder (FHR-BP). Methods The Danish High-Risk and Resilience Study VIA7 is a multisite population-based cohort of 522 7-year-old children extracted from the Danish registries. The population-based controls were matched to the FHR-SZ children on age, sex, and municipality. The FHR-BP group followed same inclusion criteria. Data were collected blinded to familial high-risk status. Outcomes were social cognition, language, and social behavior. Results The analysis included 202 FHR-SZ children (girls: 46%), 120 FHR-BP children (girls: 46.7%), and 200 controls (girls: 46.5%). FHR-SZ children displayed significant deficits in language (receptive: d = −0.27, P = .006; pragmatic: d = −0.51, P < .001), social responsiveness (d = −0.54, P < .001), and adaptive social functioning (d = −0.47, P < .001) compared to controls after Bonferroni correction. Compared to FHR-BP children, FHR-SZ children performed significantly poorer on adaptive social functioning (d = −0.29, P = .007) after Bonferroni correction. FHR-BP and FHR-SZ children showed no significant social cognitive impairments compared to controls after Bonferroni correction. Conclusion Language, social responsiveness, and adaptive social functioning deficits seem associated with FHR-SZ but not FHR-BP in this developmental phase. The pattern of results suggests adaptive social functioning impairments may not be shared between FHR-BP and FHR-SZ in this developmental phase and thus not reflective of the shared risk factors for schizophrenia and bipolar disorder.

scholarly journals The Comparison of Hypomethylating Agents (HMA) Monotherapy with HMA Combined with Intensive Chemotherapy for Intermediate / High-Risk MDS or AML

Blood ◽  
2019 ◽  
Vol 134 (Supplement_1) ◽  
pp. 3903-3903
Author(s):  
Jiang Ji ◽  
Zhao Wang ◽  
Bing Han
Keyword(s):  
High Risk ◽  
Combination Therapy ◽  
Death Rate ◽  
Therapy Group ◽  
Meta Analysis ◽  
Combination Group ◽  
Combination Therapy Group ◽  
Hypomethylating Agents ◽  
Monotherapy Group ◽  
Significant Difference

Introduction: Hypomethylating agents (HMA) azacitidine and decitabine were the first-line therapy for intermediate/ higher-risk myelodysplastic syndromes (MDS) and acute myeloid leukemia (AML) patients unsuitable for hematopoietic cell transplantation (HSCT). HMA combined with chemotherapy was recently used to achieve for a better outcome. However, few studies were carried out to compare the HMA monotherapy to the HMA and chemotherapy combination therapy. This meta-analysis aimed to compare the efficacy, survival benefit and safety of HMA monotherapy and combination therapy (with chemotherapy) in patients with intermediate/high-risk MDS or AML. Methods: Related articles published between January 2009 and April 2019 were selected and patients were separated as monotherapy group and combination group for meta-analysis. To further eliminate the potential influence of differences in patients' baseline characteristic between the two groups, subgroups with similar patients' baseline characteristics were selected for further analysis. Complete response (CR) rate, overall response (ORR) rate, 1-year overall survival (OS) rate, 1-month death rate and the proportion of adverse event (AE) were pooled and compared. Results: 13 RCT or cohort studies with 997 patients (790 in monotherapy group, 207 in HMA combination group) were selected for meta-analysis. For the pooled data, there was no significant difference in sex and cytogenetic risk between the 2 groups, but the age of combination therapy group was significantly younger than that of the monotherapy group (61.3±13.2 year-old vs 67.7±10.2 year-old, p=0.000). The CR and ORR rate were significantly higher in combination therapy group (53% vs 17%, p=0.000 for CR and 67% vs 44%, p=0.000 for ORR). However, the 1-year OS (56% for combination therapy vs 51% for HMA monotherapy group, p=0.282) and 1-month death rate (5% for combination therapy vs 4% for HMA monotherapy group, p=0.965) were similar between the two groups. The incidence of CTCAE grade 3-4 infection and bleeding were significantly higher (infection: 50% for combination therapy vs 25.7% for monotherapy group, p=0.003; bleeding: 27.5%% for combination therapy vs 7.8% for monotherapy group, p=0.004) in combination group. In subgroup analysis, 117 and 179 patients were included in combination group and HMA monotherapy group, respectively. There was no significant difference in age (69.5±4.6 vs 69.0±6.8 years old, p=0.451) and proportion of favorable/intermediate cytogenetic risk (62% vs 71%, p=0.114) between the two groups, but a significantly lower proportion of male was found in combination therapy group (57% vs 74%, p=0.003). Although combination group had a higher CR rate (49% vs 17%, p=0.000), it had similar ORR rate (58% vs 49%, p=0.140) to monotherapy group. Meanwhile, combination therapy came with higher 1-month death rate (12% vs 3%, p=0.008) and lower 1-year OS (54% vs 68%, p=0.013) compared with monotherapy group. Conclusions: HMA combined with chemotherapy could increase CR rate in all patients and ORR rate in younger patients, but could not improve OS. For patients with similar older age, combination therapy could result in higher 1-month death rate and less 1-year OS. Disclosures No relevant conflicts of interest to declare.

scholarly journals Limited Evidence for the Effect of Red Color on Cognitive Performance: A Meta-Analysis

2020 ◽  
Author(s):  
Timo Gnambs
Keyword(s):  
Test Performance ◽  
Meta Analysis ◽  
Effect Sizes ◽  
Limited Evidence ◽  
Cognitive Domains ◽  
Evidential Value ◽  
Red Color ◽  
Significant Difference ◽  
Color Priming ◽  
Different Populations

Red color supposedly affects cognitive functioning in achievement situations and impairs test performance. Although this has been shown for different cognitive domains in different populations and cultural contexts, recent studies including close replications failed to corroborate this effect. Reported here is a random-effects meta-analysis of 67 effect sizes (38 samples) that compared test performance after viewing red or a control color. For anagram tests and knowledge tests no significant difference between color conditions was found (Cohen’s d of -0.06 and -0.04); for reasoning tests the pooled effect of d = -0.34, 95% CI [-0.61, -0.06] indicated significantly lower scores in the red condition. The cumulative meta-analysis revealed substantially larger effects in initial studies as compared to subsequent research. After correcting for publication bias no evidential value for an effect of red color on intellectual performance was available. The review casts doubt on the existence of a robust color priming effect in achievement situations.

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