title: The effect of unfamiliar tasks and teachers on autistic children's negativism.
mesh_terms: D001321:Autistic Disorder / Q000523:psychology*; D002648:Child; D002675:Child, Preschool; D003674:Defense Mechanisms; D005260:Female; D006185:Habituation, Psychophysiologic; D006801:Humans; D008297:Male; D009341:Negativism; D013663:Teaching