Measures of the Halstead-Reitan Neuropsychological Battery (HRNB) were factor analyzed with subtests of the Halstead Category Test (HCT) for 277 9-year-old learning disabled subjects. Eight factors with eigenvalues greater than one were rotated to a final solution that accounted for 67.9 percent of the total variance. HCT-Subtest 1 loaded primarily on a factor that was composed of measures of attention and/or impulse control. HCT-Subtest 2 was best identified with a factor that concerned visual-spatial analysis and memory. The remaining HCT subtests loaded on two factors independently of other HRNB variables. Equal loading, but with opposite signs, was found for NCT-Subtests 3 and 4 on a single factor. An additional factor consisted of HCT-Subtest 5 (negative loading) and HCT-Subtests 6 and 7 (positive loadings). These data were interpreted as offering little support for considering the subtests of the HCT as a single measure. Examination of error scores on Subtest 5 showed that an initial difficulty in identifying the underlying concept in that subtest may have a beneficial learning effect on succeeding subtests. Statistical results are summarized in the attached tables. (Author/SLD)