| Abstract: | The purpose of this study was to determine whether distinct subgroups of children with learning disabilities could be identified using a single, recently developed instrument—the Differential Ability Scales (DAS). Ward's method of cluster analysis was used to group 83 school-verified children with learning disabilities from the standardization sample. The following six subgroups were identified: (a) generalized, (b) high functioning, (c) normal, (d) underachievement, (e) borderline, and (f) dyseidetic. Not all subgroups displayed the expected discrepancy between intelligence and achievement associated with the current definitions of I.D. In subsequent discriminant analyses, both achievement and diagnostic subtests were necessary for accuracy in classification. This study provided evidence of the DAS's ability to diagnose the learning disabled differentially and provided distinct profiles for LD subgroups. Administration of the diagnostic subtests along with achievement subtests can provide the clinician with valuable diagnostic information for LD. |
