The Biological Basis of Cross-Cultural Differences in Personality: Blood Group Antigens

Abstract

The present study extends previous work on the relationship between personality and blood group antigens to the consideration of cross-cultural differences. It is shown that for both neuroticism and extraversion, correlations between frequency of blood group antigens and personality over different countries are in the predicted direction. This is in line with hypotheses implicating genetic factors in the causation of differences in personality. Data also are given for the personality dimension of psychoticism, but for this no predictions were made.