Masculinity and femininty in the preschool years.
D000704:Analysis of Variance; D002657:Child Development; D002675:Child, Preschool; D005120:Extraversion, Psychological; D005260:Female; D006801:Humans; D007062:Identification, Psychological; D008297:Male; D010551:Personality; D012723:Sex; D012917:Social Adjustment; D012938:Social Perception