Gender equality & sex differences in personality, & evidence from a large, multi-national sample: Bigger differences when gender equality is greater

Gender equality and sex differences in personality: evidence from a large, multi-national sample. Tim Kaiser, Univ of Salzburg. July 2018. DOI: 10.17605/OSF.IO/6NUHX

Aim: findings on sex differences in personality are robust and stable across countries. Previous studies have also shown that these differences are greater in countries with greater gender equality. However, earlier studies have shortcomings as they either (a) did not use valid indicators of gender equality and development, (b) only studied broad domains of personality, (c) did not address issues of measurement invariance. The aim of this study is to replicate previous findings on the correlation between gender equality and sex differences in a methodologically robust way. Method: a large, multinational (N = 926,383) dataset was used to examine sex differences in Big Five facet scores for 70 countries. Difference scores were aggregated to a multivariate effect size (Mahalanobis' D).

Results: effect sizes were large (average D = 1.96), but varied across countries. Countries' difference scores were related to an index of gender equality, revealing a positive weighted correlation of r = .335.

Conclusion: using multivariate effect sizes derived from latent scores with invariance constraints, the study of sex differences in personality becomes more robust und replicable. Sex differences in personality should not be interpreted as results of unequal treatment, but as indicator of successful gender equality policies.