A systematic review and meta-analysis of racial/ethnic differences and similarities in executive function performance...

The extent that executive function performance varies between racial/ethnic groups in the United States is unclear, limiting future studies on the problems underlying these differences. The aim of this meta-analysis was to test two competing hypotheses: The cultural differences hypothesis asserts large differences between Whites and racial/ethnic minorities in the U.S., and small differences between- (e.g., African Americans, Latinos) and within- (e.g., Latinos: Mexican Americans, Cuban Americans) minority groups. The cultural similarities hypothesis posits small differences between Whites and minorities, and these differences are equal or smaller in magnitude than differences between- and within-minorities on executive function performance. We also tested moderators of these differences.

We focused on overall executive functioning performance and its three core components: inhibitory control, working memory, and cognitive flexibility.. A systematic search on PsycINFO, Web of Science, ERIC, PubMed, and ProQuest Dissertations and Theses Global identified 46 records (17% unpublished; 38 independent samples) with 56,067 total participants (M_age = 44.48 years; range = 3.05-80.45; 52% female; 39.5% racial/ethnic minority).

Absolute differences between Whites and minorities (d = 0.85, 95% CI [0.65, 1.05]) were larger in magnitude compared to between-minorities (d = 0.44, 95% CI [0.28, 0.60]) and within-minorities (d = 0.09, 95% CI [0.03, 0.15]). White-minority differences were moderated by type of executive function measure and year of data collection. Post hoc analyses revealed large relative differences between some groups but not others.

Findings support the cultural differences hypothesis for executive function performance. This meta-analysis underscores the need to address social inequalities in the U.S. that drive performance differences. (PsycInfo Database Record (c) 2021 APA, all rights reserved).