Subgroups of Children With Autism by Cluster Analysis: A Longitudinal Examination - 05/09/11
ABSTRACT |
Objectives |
A hierarchical cluster analysis was conducted using a sample of 138 school-age children with autism. The objective was to examine (1) the characteristics of resulting subgroups, (2) the relationship of these subgroups to subgroups of the same children determined at preschool age, and (3) preschool variables that best predicted school-age functioning.
Method |
Ninety-five cases were analyzed.
Results |
Findings support the presence of 2 subgroups marked by different levels of social, language, and nonverbal ability, with the higher group showing essentially normal cognitive and behavioral scores. The relationship of high- and low-functioning subgroup membership to levels of functioning at preschool age was highly significant.
Conclusions |
School-age functioning was strongly predicted by preschool cognitive functioning but was not strongly predicted by preschool social abnormality or severity of autistic symptoms. The differential outcome of the 2 groups shows that high IQ is necessary but not sufficient for optimal outcome in the presence of severe language impairment.
Le texte complet de cet article est disponible en PDF.Key Words : autism, subtype, subgroup, cluster, IQ
Plan
| This work was supported by NINDS grant 20489 to the Autism and Language Disorders Collaborative Project: Preschool Study Group (Dr. Ronald David and Dr. Isabelle Rapin, Principal Investigators for Phase I and II of the project). The authors are grateful to the coinvestigators on the project, including Drs. Dorothy Aram, Robin Morris, and Barbara Wilson, and to Dr. Nancy Hall, Dr. Laurel Wainwright, and Ms. Harriet Levin for their invaluable collaboration. They also thank the children, parents, and teachers who participated in the study and the dedicated research assistants who worked so ably with the children and their families. |
Vol 39 - N° 3
P. 346-352 - mars 2000 Retour au numéro
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