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Constructs Assessed by the GARS-2: Factor Analysis of Data from the Standardization Sample.
- Source :
-
Journal of Autism & Developmental Disorders . Sep2010, Vol. 40 Issue 9, p1118-1130. 13p. 5 Charts. - Publication Year :
- 2010
-
Abstract
- The GARS-2 (Gilliam ) is widely used for autism screening; however, the validity of its three conceptually-derived subscales has not been evaluated. In this study, exploratory (EFA) and confirmatory (CFA) factor analyses of data from matched subgroups of the standardization sample did not support the GARS-2 subscale structure. EFAs identified four factors in the model development subgroup ( n = 496): stereotyped/repetitive behavior, stereotyped/idiosyncratic language, word use problems, and social impairment. CFAs supported this model in the replication subgroup ( n = 494). Findings suggest that the GARS-2 subscales have limited clinical utility and that the Autism Index should be interpreted with caution. Although more research is needed, the clinical utility of the four empirically-derived scales may be limited by factors related to item content and test development procedures. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 01623257
- Volume :
- 40
- Issue :
- 9
- Database :
- Academic Search Index
- Journal :
- Journal of Autism & Developmental Disorders
- Publication Type :
- Academic Journal
- Accession number :
- 52859014
- Full Text :
- https://doi.org/10.1007/s10803-010-0967-1