A-15 Examining the Construct Validity of the Halstead Category Test - Computer Version: A Confirmatory Factor Analysis

Abstract

Abstract Objective To examine evidence of construct validity for the Halstead Category Test – Computer Version (HCT-CV). Previous factor analyses on the HCT generally found the following structure: a Counting factor comprised of Subtests I and II; a Spatial Reasoning factor of Subtests III, IV, and VII; and a Proportional Reasoning factor of Subtests V and VI. Method Data were collected from a diagnostically heterogeneous sample of 105 adults (56 males, 49 females) referred for neuropsychological evaluation who completed the HCT-CV. The sample had an average educational attainment of 14.37 years (SD = 2.98 years) and an average age of 62.30 years (SD = 17.53). The total number of errors made on each of the seven HCT subtests were computed for each participant, and these data were used to complete a regularized confirmatory factor analysis based on the identified factor structure of the HCT. Results The confirmatory factor analysis converged normally. The model fitting the HCT factor structure demonstrated excellent overall fit to the HCT-CV data: χ2(11) = 12.20, p = .35; RMSEA = 0.03 (95% CI: 0.00 to 0.11); SRMR = 0.03; CFI = 1.00; TLI = 0.99. Analysis of the residuals and modification indexes further confirmed the excellent model fit. Conclusions The HCT-CV demonstrates what appears to be an unchanged factor structure to the HCT. This finding supports the computerized version construct validity as being seemingly unchanged from that of the slide projector version. This model fit may be viewed as promising for the comparability between the original version and the computerized version.