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Peer reviewedSzatmari, Peter – Journal of Autism and Developmental Disorders, 1992
This paper reviews 20 studies that investigated the internal or external validity of various subtypes of autistic spectrum disorders. At least three groups could be distinguished from autism on clinical grounds: an Asperger syndrome subtype, and two atypical subtypes characterized by either low intelligence quotient or high intelligence quotient.…
Descriptors: Classification, Clinical Diagnosis, Handicap Identification, Intelligence Quotient
Peer reviewedTsai, Luke Y. – Journal of Autism and Developmental Disorders, 1992
This paper reviews whether Rett syndrome is a subtype of pervasive developmental disorders (PDD). The paper analyzes internal and external diagnostic validity and discusses whether Rett syndrome is a neurological disorder or a mental disorder. The paper concludes that data support the idea of classifying Rett syndrome as a subtype of PDD.…
Descriptors: Classification, Clinical Diagnosis, Developmental Disabilities, Handicap Identification
Peer reviewedRutter, Michael; Schopler, Eric – Journal of Autism and Developmental Disorders, 1992
This essay notes the complexities inherent in classifying pervasive developmental disorders (PDD), especially when a single classification scheme is to be used for clinical, research, and administrative purposes. The paper considers principles of classification, symptomatology, the neuropsychiatric interface, the value of a multiaxial approach,…
Descriptors: Classification, Clinical Diagnosis, Developmental Disabilities, Diagnostic Tests
Peer reviewedCastelloe, Paul; Dawson, Geraldine – Journal of Autism and Developmental Disorders, 1993
Forty parents of children with autism or pervasive developmental disorder completed the Wing Subgroups Questionnaire, developed for subclassifying children into one of L. Wing's three hypothesized subgroups. Results indicated that the questionnaire has adequate external criterion-referenced validity, with similar subgroup ratings made by…
Descriptors: Behavior Rating Scales, Classification, Clinical Diagnosis, Handicap Identification
Peer reviewedSevin, Jay A.; And Others – Journal of Autism and Developmental Disorders, 1995
A cluster analytic study was conducted to derive behaviorally homogeneous subtypes of pervasive developmental disorders (PDD) based on a range of behavioral symptoms that characterize autism. Analysis of data on 34 children with PDD, 27 of whom met criteria for autism, indicated 4 distinct groups differing on independent measures of social,…
Descriptors: Behavior Patterns, Children, Classification, Cluster Analysis
Direct linkScruggs, Thomas E., Ed.; Mastropieri, Margo A., Ed. – JAI Press, 2004
Secondary education of students with learning and behavioral disabilities is an issue of great importance. Unlike elementary schools, secondary schools require substantially more independent functioning, assume the effective use of student planning and study skills, and often lack the classes in basic skills needed by some learners. Further, new…
Descriptors: Secondary Education, Secondary School Students, Learning Disabilities, Behavior Disorders
