No abstract available
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Adolescent
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Autistic Disorder / diagnosis
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Autistic Disorder / psychology*
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Child
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Child, Preschool
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Down Syndrome / diagnosis
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Down Syndrome / psychology
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Fantasy*
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Female
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Humans
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Imitative Behavior
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Male
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Motivation*
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Play and Playthings*
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Reinforcement, Verbal