A hierarchical factor solution was obtained for intercorrelations among the 10 regular WISC-R subtests for 169 children and adolescents referred to a community agency for assessment. This sample was predominantly rural but quite heterogeneous with respect to age, ability, and type of referral problem. The findings indicated an ability hierarchy composed of a strong general (g) factor and two sub-general factors corresponding to the spatial-perceptual (k:m) and verbal-educational (v:ed) parameters of Vernon's (1950) structural paradigm.
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