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Sex Differences in Verbal Working Memory: A Systematic Review an Meta-Analysis

期刊

PSYCHOLOGICAL BULLETIN
卷 147, 期 4, 页码 352-398

出版社

AMER PSYCHOLOGICAL ASSOC
DOI: 10.1037/bul0000320

关键词

meta-analysis; sex differences; verbal; working memory

资金

  1. Natural Sciences and Engineering Research Council of Canada (NSERC) [RGPIN 2015-04416, RGPIN 2016-03635]

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This meta-analysis quantified sex differences in verbal working memory and found a small overall female advantage. The study also revealed that the magnitude of female advantage varied across different memory tasks and was influenced by factors such as recall direction, stimulus type, presentation format, response format, age, sample source, and contact with authors. These results have implications for understanding sex differences in episodic memory and have relevance for clinical applications and theory building.
The present meta-analysis aimed to quantify sex differences in verbal working memory and to examine potential moderators of these differences. We examined 802 effect sizes from 478 samples in 284 studies in a multilevel meta-analysis. Results revealed a small overall female advantage (g = .028, 95% CI [.006, .050]). In the overall sample. results showed that sex differences differed across tasks. Specifically, the female advantage was significant for cued tasks (g = .079. 95% CI (.030, .128]) and Free Recall tasks (g = .145, 95% CI [.102, .188]) whereas there was a male advantage on Complex Span (g = -.042, 95% CI [-.083, -.002]), and no sex differences on Serial Recall (g = .003, 95% CI [ -.055, .050]), and Simple Span tasks (g < .001, 95% CI [ -.034, .033]). Within each task, we found that recall direction, stimulus type, presentation format, response format, and age accounted for significant variance in at least 1 of the tasks. Analyses provided no evidence of a publication bias, although the female advantage varied as a function of sample source, whether the title made reference to sex, and whether authors had to be contacted to obtain relevant data. Results are discussed in terms of their implications for sex differences in episodic memory and in the context of clinical applications and theory building.

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