Child work and social class.
D000704:Analysis of Variance; D001900:Boston; D002648:Child; D002657:Child Development; D002675:Child, Preschool; D006801:Humans; D007182:Income; D007361:Intelligence Tests; D007406:Interview, Psychological; D008297:Male; D010552:Personality Assessment; D010553:Personality Development; D012649:Self Concept; D012923:Social Class; D014937:Work