title: Character structure and friendship relations.
mesh_terms: D000328:Adult; D001007:Anxiety; D002605:Character; D005120:Extraversion, Psychological; D006801:Humans; D007175:Impulsive Behavior; D007398:Interpersonal Relations; D007439:Introversion, Psychological; D008297:Male; D012649:Self Concept; D012737:Sex Factors; D012930:Social Dominance; D012951:Socialization