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 language | English |
|---|---|
| Pages (from-to) | 249-257 |
| Number of pages | 9 |
| Journal | Clinical Neuropsychologist |
| Volume | 11 |
| Issue number | 3 |
| Publication status | Published - Aug 1997 |
Cite this
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 journal › Article
}
TY - JOUR
T1 - WAIS-R subtest pattern clusters in closed-head-injured and healthy samples
AU - Crawford, John Robertson
AU - Garthwaite, P H
AU - Johnson, David
AU - Mychalkiw, B
AU - Moore, Joe
PY - 1997/8
Y1 - 1997/8
N2 - 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.
AB - 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.
M3 - Article
VL - 11
SP - 249
EP - 257
JO - Clinical Neuropsychologist
JF - Clinical Neuropsychologist
SN - 1385-4046
IS - 3
ER -