Conscientiousness and Cognitive Abilities: a Meta-Analysis

Abstract

This paper analyzes the current state of knowledge regarding the relationship between Conscientiousness and cognitive ability. The association between the two variables, the correlation between the sub-factors of Conscientiousness and cognitive ability and the impact of the sample type on the relationship were explored. Following a systematic literature review, 81 unique studies were identified. In terms of inclusion criteria, studies had to (1) report any link between Conscientiousness and cognitive ability, (2) conceptualize Conscientiousness through the Big Five model, and (3) report a measure of cognitive ability (regardless of conceptualization). Several random-effects meta-analyses were conducted, obtaining meta-analytical correlations of .02, -.06 and -.06 between Conscientiousness (global) and cognitive abilities (global), crystallized intelligence and fluid intelligence, respectively. Moreover, for the correlations between the facets of Conscientiousness and cognitive abilities, 6 random-effect models were carried out, however the evidence was statistically significant only in the case of order and achievement striving scales. Finally, the sample type was considered as a potential moderator of the relationship between conscientiousness and cognitive ability, but it was not supported by the available data. These findings were discussed within the context of the relevant literature and several limitations and directions for future research were also taken into consideration.