The development of speech and mental processes in a pair of twins: a case study.
D002675:Child, Preschool; D004200:Diseases in Twins; D005260:Female; D006801:Humans; D007223:Infant; D008607:Intellectual Disability / Q000235:genetics / Q000534:rehabilitation*; D007361:Intelligence Tests; D007804:Language Development; D008037:Linguistics; D013060:Speech; D013663:Teaching / Q000379:methods