An attempt to cross-validate Eysenck's hypothesis regarding the relationship between extraversion and tough-mindedness.
D001290:Attitude; D003431:Cross-Cultural Comparison; D005120:Extraversion, Psychological; D005260:Female; D006801:Humans; D007492:Iran; D008297:Male; D010551:Personality; D010555:Personality Inventory; D011581:Psychological Tests