title: Temperament characteristics of children in relation to gender, birth order, and social class.
mesh_terms: D001722:Birth Order; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D009043:Motor Activity; D010551:Personality; D012737:Sex Factors; D012923:Social Class; D013694:Temperament