Methods and preliminary results.
D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D003210:Concept Formation; D005260:Female; D005783:Gender Identity; D005793:Generalization, Psychological; D006801:Humans; D008297:Male; D009034:Mother-Child Relations; D011932:Reading; D012959:Socioeconomic Factors; D013240:Stereotyping; D014705:Verbal Behavior