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Keywords:

  • atypical autism;
  • autistic symptoms;
  • childhood autism;
  • high-functioning;
  • pervasive developmental disorders (PDD)

Abstract  To assess autistic symptom differences between high-functioning atypical autism (atypical symptomatology) (HAA; IQ ≥ 70) and childhood autism (HCA), 53 HAA children (mean: 6.0 ± 0.5 years) were compared with 21 HCA children (mean: 8.2 ± 1.1 years) on the Childhood Autism Rating Scale–Tokyo version (CARS-TV). Because IQ on the Japanese version of the Stanford–Binet and CARS-TV total scores differed significantly between HAA and HCA, analysis of covariance was conducted with IQ and CARS-TV total scores controlled for. In two items of CARS-TV (relationship with people and general impressions) the HAA children were significantly less abnormal than the HCA children. Affect tended to be significantly milder in HAA than HCA. Anxiety reaction was significantly more abnormal in HAA than HCA. These findings may be useful to distinguish between HAA and HCA.