DSM-III and DSM-III-R diagnosis of autism and pervasive developmental disorder in nursery school children.

DSM-III and DSM-III-R diagnoses of 112 developmentally disordered preschool children were compared. There was no significant difference between the DSM-III and DSM-III-R diagnosis of the inclusive category of pervasive developmental disorder, but nearly twice as many cases (58) were diagnosed as autistic disorder by DSM-III-R criteria as were diagnosed as infantile autism (31) by DSM-III. Thirty children met both DSM-III and DSM-III-R criteria for autism (IA/AD) and 23 received a DSM-III diagnosis of atypical PDD (A-PDD) and a DSM-III-R diagnosis of AD (A-PDD/AD). All of the IA/AD children and none of the A-PDD/AD group displayed a marked lack of awareness of others. DSM-III-R criteria have specifically broadened the concept of autism to include children who, although socially impaired, are not pervasively unresponsive to others.