When do we know what a child knows?
D001288:Attention; D002648:Child; D002652:Child Behavior; D004645:Empathy; D005260:Female; D006801:Humans; D007802:Language; D007858:Learning; D008297:Male; D009949:Orientation; D010551:Personality; D011581:Psychological Tests / Q000592:standards*; D011594:Psychometrics; D012737:Sex Factors; D014705:Verbal Behavior