Since the publication of the Wechsler Intelligence Scalefor Children - Third Edition (WISC-III, 1991), several alternative scoring frameworks have been developed based on American norms. One such framework is the General Ability Index (GAI). The GAI provides a composite score using the eight subtests from the Verbal Comprehension Index (VCI) and the Perceptual Organization Index (POI). The GAI is an appropriate substitute for the Full Scale IQ score if the VCI and POI are considered better estimates of the child's verbal and nonverbal reasoning abilities than the Verbal IQ and the Performance IQ scores. The tables for calculating the GAI using Canadian norms are presented.
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References
1.
Beal, A. L. (1988). Canadian content in the WISC-R: Bias or jingoism. Canadian Journal of Behavioral Science, 20, 154-166.
2.
Beal, A. L., Dumont, R., Cruse, C. L. & Branche, A. H. (1996). Practical implications of differences between the American and Canadian norms for WISC-III and a short form for children with learning disabilities. Canadian Journal of School Psychology, 12,1, 7-14.
3.
Braden, J. P., & Hannah, J. M. (1998). Assessment of hearing-impaired and deaf children with the WISC-III. In A. Prifitera & D. Saklofske (Eds.), WISC-III clinical use and Interpretation (pp. 175-201). San Diego: Academic Press.
4.
Dumont, R. & Faro, C. (1993). A WISC-III short-form for learning disabled students. Psychology in the Schools, 30, 212-219.
5.
Hynd, G. W., Cohen, M. J., Riccio, C. A., & Arceneaux, J. M. (1998). Neuropsychological basis of intelligence and the WISC-III. In A. Prifitera & D. Saklofske (Eds.), WISC-III clinical use and interpretation (pp. 203-226). San Diego: Academic Press.
6.
Kaufman, A. S. (1994). Intelligent testing with the WISC-III. New York: Wiley.
7.
Mark, R., Beal, A. L., & Dumont, R. (1998). Validation of a WISC-III short-form for the identification of Canadian gifted students. Canadian Journal of School Psychology,14, 1-10.
8.
Phelps, L. (1998). Utility of the WISC-III for children with language impairments. In A. Prifitera & D. Saklofske (Eds.), WISC-III clinical use and interpretation (pp. 157-174). San Diego: Academic Press.
9.
Prifitera, A., Weiss, L. G., & Saklofske, D. H. (1998). The WISC-III in context. In A. Prifitera & D. Saklofske (Eds.), WISC-III clinical use and Interpretation (pp. 1-38). San Diego: Academic Press.
10.
Reynolds, C. R., Sanchez, S., & Willson, V. L. (1996). Normative tables for calculating the WISC-III performance and full scale IQs when symbol search is substituted for coding. Psychological Assessment, 8, 378-382.
11.
Rourke, B. P. (1998). Significance of verbal-performance discrepancies for subtypes of children with learning disabilities: opportunities for the WISC-III. In A. Prifitera & D. Saklofske (Eds.), WISC-III clinical use and interpretation (pp. 139-156). San Diego: Academic Press.
12.
Saklofske, D. H., Hildebrand, D. K., Reynolds, C. R., & Willson, V. (1998). Substituting symbol search for coding on the WISC-III; Canadian normative tables for performance and full scale IQ scores. Canadian Journal of Behavioral Science, 30, 57-68.
13.
Saklofske, D. H. & Janzen, H. L. (1990). School-based assessment research in Canada. McGill Journal of Education, 25, 5-23.
14.
Schwean, V. L., & Saklofske, D. H. (1998). WISC-III assessment of children with attention deficit/ hyperactivity disorder. In A. Prifitera & D. Saklofske (Eds.), WISC-III clinical use and Interpretation (pp. 91-118). San Diego: Academic Press.
15.
Teeter, P. A., & Korducki, R. (1998). Assessment of emotionally disturbed children with the WISC-III. In A. Prifitera & D. Saklofske (Eds.), WISC-III clinical use and Interpretation (pp. 119-138). San Diego: Academic Press.
16.
Wechsler, D. (1991). Manual for the Wechsler Intelligence Scale for Children-Third Edition. San Antonio: The Psychological Corporation.
17.
Wechsler, D. (1996). Manual: Canadian Supplement to the Wechsler Intelligence Scale - Third Edition. Toronto: The Psychological Corporation.
