This study evaluated the construct validity of the Wechsler Intelligence Scale for Children, Third Edition (WISC-III) with children (ages 8 to 13) having learning disabilities who were either Hispanic (N=120) or Non-Hispanic white (N=120). Factor analyses found that the WISC III has a three factor structure consisting of verbal comprehension, perceptual organization, and processing speed. This structure was found for the total, the Hispanic, and the Non-Hispanic White samples. Furthermore, the three-factor structure was supported in both canonical factor analysis and alpha factor analysis. Results support the validity of the WISC-III when used with Hispanic and Non-Hispanic white children with learning disabilities. Seven tables detail the factor analyses performed. (DB)