Sex Differences and Similarities in Married Couples: Patterns Across and Within Cultures

In this study, we examined the patterns of sex differences in men and women married to each other in five cultures (China, Russia, Turkey, UK, and the U.S.) to look for universal patterns in behavioral dimorphisms and for cultural variability in those patterns. Over 400 couples in each cultural group completed the 235-item Marriage and Relationship Questionnaire on various aspects of marriage, appropriately translated for each culture. Sex differences were anticipated in responses related to female choosiness, labor performed, emotional expressiveness, interest in sex, physical attractiveness, and jealousy. To measure male–female differences in each culture, t -tests were utilized, and effect sizes were calculated. Significant sex differences ( p