A Three-Dimensional Haptic Matrix Test of Nonverbal ReasoningBy Miller, Joseph C.; Skillman, Gemma D.; Benedetto, Joanne M.; Holtz, Ann M.; Nassif, Carrie L.; Weber, Anh D.; Journal of Visual Impairment and Blindness,
Publication Date: September 2007
Article presents the results of an evaluation of the convergent-divergent validity of a three-dimensional haptic (3-DHM) test of nonverbal reasoning. The test consisted of six 2-by-2 practice matrices and nineteen 3-by-3 test matrices. Each matrix consisted of beads that were stacked in various horizontal and, in some cases, vertical configuration on all but the lower-right post. To solve each puzzle, a participant haptically identified the combination of beads to be stacked on the unoccupied post, thereby completing the pattern. As a measure of convergent validity, the 5 performance subtests of the Cognitive Test for the Blind (CTB) and the verbal subtests of the third edition of the Wechsler Adult Intelligence Scales (WAIS-III) were administered to 21 adults with various levels of visual impairment. Results indicated that the 3-DHM correlated highly with the CTB and moderately with WAIS-III, which seems to suggest the 3-DHM measures haptic spatial ability, rather than general nonverbal ability. Presently, the 3-DHM is best considered a “promising” test, rather than a validated one.
Assistive Products Discussed: WECHSLER ADULT INTELLIGENCE SCALE-REVISED (WAIS-R)
COMPREHENSIVE VOCATIONAL EVALUATION SYSTEM (MODEL S213)
Published by: AFB Press (Website:http://www.afb.org/Section.asp?SectionID=46)
American Foundation for the Blind (AFB) (Web Site: http://www.afb.org )