title: The performance of cultural-familial retardates on conservation tasks.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D002657:Child Development; D003071:Cognition; D005260:Female; D006801:Humans; D008607:Intellectual Disability / Q000523:psychology*; D007360:Intelligence; D008297:Male; D011581:Psychological Tests; D012737:Sex Factors