A four-and-a-half year old as a teacher of her hearing-impaired sister: a case study.
D000367:Age Factors; D002675:Child, Preschool; D003216:Conditioning, Operant; D003638:Deafness / Q000534:rehabilitation*; D005260:Female; D006801:Humans; D007100:Imitative Behavior; D012201:Reward; D012801:Sibling Relations; D013060:Speech; D013070:Speech Therapy; D013663:Teaching; D014705:Verbal Behavior; D014796:Visual Perception