Abstract
A comparison was conducted, with the purpose of investigating the intelligence structure of the mental retardates, on the results of an administration of Wechsler Adult Intelligence Scale (WAIS) to the groups of both normal and mentally retarded persons. Intercorrelations among the WAIS subtest scores for each group were separately analyzed by the method of principal component analysis. Three common factors were found for the two groups: (1) the factor of general intelligence, (2) the factor separating verbal subtests from all other subtests, and (3) the factor separating numerical subtests from all other subtests. There were no clear difference in intelligence structure between the mental retardates and the normals.
