WAIS-R subtest pattern clusters in closed-head-injured and healthy samples

John Robertson Crawford, P H Garthwaite, David Johnson, B Mychalkiw, Joe Moore

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Cluster analysis was performed on the WAIS-R subtest scores of a closed-head-injured (CHI) sample (n = 233) in an attempt to replicate and extend the findings of Crosson, Greene, Roth, Farr, and Adams (1990). The same analysis was also run with a healthy sample (n = 326) recruited to match the general adult population in terms of demographic variables; a subsample matched to the CHI sample was also formed (n = 117). Eleven clusters were extracted from the CHI sample, five of which contained 10 or more members. There was a low degree of correspondence between these latter clusters and the six subtest patterns clusters reported by Crosson et al. The importance of Verbal/Performance discrepancies in the formation of clusters in CHI was examined by comparing Verbal/Performance composites against arbitrary composites in CHI and healthy samples. In the CHI sample both sets of composites yielded significant effects but a larger effect size was obtained for the Verbal/Performance composites. However, the same pattern of results was observed in the healthy samples. Finally, a combined cluster analysis (N = 559) revealed that, although there was a significant difference in the number of CHI and healthy participants in each cluster, there was a high degree of overlap in cluster membership.

Original languageEnglish
Pages (from-to)249-257
Number of pages9
JournalClinical Neuropsychologist
Volume11
Issue number3
Publication statusPublished - Aug 1997

Cite this

Crawford, J. R., Garthwaite, P. H., Johnson, D., Mychalkiw, B., & Moore, J. (1997). WAIS-R subtest pattern clusters in closed-head-injured and healthy samples. Clinical Neuropsychologist, 11(3), 249-257.

WAIS-R subtest pattern clusters in closed-head-injured and healthy samples. / Crawford, John Robertson; Garthwaite, P H ; Johnson, David; Mychalkiw, B ; Moore, Joe.

In: Clinical Neuropsychologist, Vol. 11, No. 3, 08.1997, p. 249-257.

Research output: Contribution to journalArticle

Crawford, JR, Garthwaite, PH, Johnson, D, Mychalkiw, B & Moore, J 1997, 'WAIS-R subtest pattern clusters in closed-head-injured and healthy samples', Clinical Neuropsychologist, vol. 11, no. 3, pp. 249-257.
Crawford JR, Garthwaite PH, Johnson D, Mychalkiw B, Moore J. WAIS-R subtest pattern clusters in closed-head-injured and healthy samples. Clinical Neuropsychologist. 1997 Aug;11(3):249-257.
Crawford, John Robertson ; Garthwaite, P H ; Johnson, David ; Mychalkiw, B ; Moore, Joe. / WAIS-R subtest pattern clusters in closed-head-injured and healthy samples. In: Clinical Neuropsychologist. 1997 ; Vol. 11, No. 3. pp. 249-257.
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