This study evaluated the criterion-related validity for the Speed of Processing (SP) factor of the Differential Ability Scales (DAS; Elliott, 1990). The SP factor is comprised of one subtest score (Speed of Information Processing) based on results from factor analyses. Participants were an epidemiological sample (N= 1,400) stratified, within age levels, in proportion to census data on demography (e.g., race, gender, parents' educational levels). From this cohort, groups with unusual SP strengths and SP weaknesses were identified using General Cognitive Ability (GCA) scores from the DAS as contrasts (i.e., SP>GCA and GCA>SP differences at a population prevalence < 5%). The SP>GCA group (n= 60) and the GCASP group (n = 60) were matched to respective controls (where each control n = 60) on the demographic variables listed above and GCAs. Each group and its control were compared across three norm-referenced measures of achievement and six teacher-rated indices of behavioral adjustment. Comparisons failed to show significant differences on any criterion variable. Results are discussed in the context of how well epidemiological samples evaluate the validity of ability profiles and the need for future research to use more representative measures of processing speed (i.e., those with two or more subtests contributing to the factor).
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References
1.
Anastopoulos, A. D. , Spisto, M. A., & Maher, M. C. (1994). The WISCIII freedom from distractibility factor: Its utility in identifying children with attention deficit hyperactivity disorder. Psychological Assessment, 6, 368-371.
2.
Board of Scientific Affairs of the American Psychological Association . (1996). Intelligence: Knowns and unknowns. American Psychologist, 51, 77-101.
3.
Bowers, T. G. , Risser, M. G., Suchanec, J. F., Tinker, D. E., Ramer, J. C., & Domoto, M. (1992). A developmental index using the Wechsler Intelligence Scale for Children: Implications for the diagnosis and nature of ADHD. Journal of Learning Disabilities, 25, 179-185.
4.
Carroll, J. B. (1993). Human cognitive abilities: A survey of factor-analytic studies. Cambridge, England: Cambridge University Press.
5.
Cohen, J. (1988). Statistical power analysis for the behavioral sciences (2nd ed.). Hillsdale, NJ: Lawrence Erlbaum Associates.
6.
Daley, C. E. , & Nagle, R. J. (1996). Relevance of WISC-III indicators for assessment of learning disabilities. Journal of Psychoeducational Assessment, 14, 320-333.
7.
Elliott, C. D. (1990). Differential Ability Scales: Introductory and technical handbook. San Antonio, TX: The Psychological Corporation.
8.
Figueroa, R. A. , & Sassernath, J. M. (1989). A longitudinal study of the predictive validity of the System of Multicultural Pluralistic Assessment (SOMPA). Psychology in the Schools, 26, 1-19.
9.
Glutting, J. J. , McDermott, P. A., & Konold, T. R. (1997). Ontology, structure, and diagnostic benefits of a normative subtest taxonomy from the WISC-III standardization sample. In D. P. Flanagan, J. L. Genshaft, & P. L. Harrison (Eds.), Beyond traditional intellectual assessment: Contemporary and emerging theories, tests, and issues (pp. 349-372). New York: Guilford.
10.
Glutting, J. J. , McDermott, P. A., Konold, T. R., Snelbaker, A. J., & Watkins, M. W. (1998). More ups and downs of subtest analysis: Criterion validity of the DAS with an unselected cohort. School Psychology Review, 27, 599-612.
11.
Glutting, J. J. , McDermott, P. A., Prifitera, A., & McGrath, E. A. (1994). Core profile types for the WISC-III and WIAT: Their development and application in identifying multivariate IQ-achievement discrepancies. School Psychology Review, 23, 619-639.
12.
Glutting, J. J. , McDermott, P. A., Watkins, M. W., Kush, J. C., & Konold, T. R. (1997). The base rate problem and its consequences for interpreting children's ability profiles. School Psychology Review, 26, 176-188.
13.
Glutting, J. J. , Youngstrom, E. A., Ward, T., Ward, S., & Hale, R. (1997). Incremental efficacy of WISC-III factor scores in predicting achievement: What do they tell us?Psychological Assessment, 9, 295-301.
14.
Kamphaus, R. W. (1993). Clinical assessment of children's intelligence. Boston: Allyn and Bacon.
15.
Kaufman, A. S. (1994). Intelligent testing with the WISGIII. New York: Wiley.
16.
Keith, T. Z. (1990). Confirmatory and hierarchical confirmatory analysis of the Differential Ability Scales. Special Issue: Intelligence: Theories and practice. Journal of Psychoeducational Assessment, 8, 391-405.
17.
Keith, T. Z. , & Witta, E. L. (1997). Hierarchical and cross-age confirmatory analysis of the WISC-III: What does it measure?School Psychology Quarterly, 12, 89-107.
18.
Kranzler, J. H. (1997). What does the WISC-III measure? Comments on the relationship between intelligence, working memory capacity, and information processing speed and efficiency. School Psychology Quarterly, 12, 110-116.
19.
Larson, G. E. , & Alderton, D. L. (1992). The structure and capacity of thought: Some comments on the cognitive underpinnings of g. In D. K. Detterman (Ed.) Current topics in human intelligence: Is mind modular or unitary? (pp. 141-156). Norwood, NJ: Ablex Publishing Corporation.
20.
Lehr, S. , & Fischer, B. (1988). The basic parameters of human information processing: Their determination of intelligence. Personality and Individual Differences, 10, 883-896.
21.
Lufti, D. , Cohen, A., & Parish-Plass, J. (1990). Identifying ADHD with the WISC-R and the Stroop Color Word Test. Psychology in the Schools, 24, 338-344.
22.
McDermott, P. A. (1993). National standardization of uniform multisituational measures of child and adolescent behavior pathology. Psychological Assessment, 5, 413-424.
23.
McDermott, P. A. , Fantuzzo, J. W., & Glutting, J. J. (1990). Just say no to subtest analysis: A critique of Wechsler theory and practice. Journal of Psychoeducational Assessment, 8, 290-302.
24.
McDermott, P. A. , Fantuzzo, J. W.Glutting, J. J., Watkins, M. W., & Baggaley, A. R. (1992). Illusions of meaning in the ipsative assessment of children's abilities. Journal of Special Education, 25, 504-526.
25.
McDermott, P. A. , Glutting, J. J., Jones, J. N., Watkins, M. W., & Kush, J. (1989). Core profile types in the WISC-R national sample: Structure, membership, and applications. Psychological Assessment, 1, 292-299.
26.
McDermott, P. A. , Marston, N. C., & Stott, D. H. (1993). Adjustment Scales for Children and Adolescents. Philadelphia: Edumetric and Clinical Science.
27.
McGrew, K. S. (1994). Clinical interpretation of the Woodcock-Johnson Tests of Cognitive Ability-Revised. Needham Heights, MA: Allyn and Bacon.
28.
Messick, S. (1995). Validity of psychological assessment: Validation of inferences from persons' responses and performances as scientific inquiry into score meaning. American Psychologist, 50, 741-749.
29.
Morris, R. D. , Stuebing, K. K., Fletcher, J. M., Shaywitz, S. E., Lyon, G. R., Shankweiler, D. P., Katz, L., Francis, D. J., & Shaywitz, B. A. (1998). Subtypes of reading disability: Variability around a phonological core. Journal of Educational Psychology, 90, 347-373.
30.
Plante, T. G. , & Sykora, C. (1994). Are stress and coping associated with WISC-III performance among children?Journal of Clinical Psychology, 50, 759-762.
31.
Prifitera, A. , & Dersh, J. (1993). Base rates of WISC-III diagnostic subtest patterns among normal, learning-disabled, and ADHD samples. In B. A. Bracken & R. S. McCallum (Eds.), Journal of Psychoeducational Assessment monograph series, advances in psychoeducational assessment: Wechsler Intelligence Scale for Children-Third Edition (pp. 43-55). Germantown, TN: The Psychoeducational Corporation.
32.
Rutter, M. (1989). Isle of Wright revisited: Twenty-five years of child psychiatric epidemiology. Journal of the American Academy of Child and Adolescent Psychiatry, 28, 633-653.
33.
Sattler, J. M. (1988). Assessment of children (3rd ed.). San Diego, CA: Author.
34.
Sattler, J. M. (1992). Assessment of children: WISCIII and WPPSI-R supplement. San Diego, CA: Author.
35.
Schwean, V. L. , & Saklofske, D. H. (1998). WISC-III assessment of Children with Attention Deficit/Hyper-activity Disorder. In A. Prifitera & D. H. Saklofske (Eds.), WISC-III clinical use and interpretation (pp. 91-118). San Diego: Academic Press.
36.
Schwean, V. L. , Saklofske, D. H., Yackulic, R. A., & Quinn, D. (1993). WISC-III performance of ADHD children. In B. A. Bracken & R. S. McCallum (Eds.), Journal of Psychoeducational Assessment monograph series, advances in psychoeducational assessment: Wechsler Intelligence Scale for Children-Third Edition (pp. 56-70). Germantown, TN: The Psychoeducational Corporation.
37.
Shaywitz, S. E. , Shaywitz, B. A., Fletcher, J. M., & Escobar, M. D. (1990). Prevalence of reading disability in boys and girls: Results of the Connecticut longitudinal study. Journal of the American Medical Association, 264, 998-1002.
38.
Sines, J. O. (1966). Actuarial methods in personality assessment. In B. A. Maher (Ed.), Progress in experimental personality research (pp. 133-193). New York: Academic Press.
39.
Stinnett, T. A. , Havey, J. M., & Oehler-Stinnett, J. (1994). Current test usage by practicing school psychologist: A national survey. Journal of Psychoeducational Assessment, 12, 331-350.
40.
Teeter, P. A. , & Smith, P. L. (1993). WISC-III and WJ-R: Predictive and discriminant validity for students with severe emotional disturbance. In B. A. Bracken & R. S. McCallum (Eds.), Journal of Psychoeducational Assessment monograph series, advances in psychoeducational assessment: Wechsler Intelligence Scale for Children-Third Edition (pp. 114-123). Germantown, TN: The Psychoeducational Corporation.
41.
Thorndike, R. L. (1994). g. Intelligence, 19, 145-155.
42.
U.S. Bureau of the Census . (1986). Current population survey, October 1986 [machine-readable data file]. Washington, DC: U. S. Bureau of the Census.
43.
U.S. Department of Commence . (1990). School enrollment-Social and economic characteristics of students. Current population reports (Series P-20, No. 443). Washington, DC: Bureau of the Census.
44.
Watkins, M. W. , & Kush, J. C. (1994). Wechsler subtest analysis: The right way, the wrong way, or no way?School Psychology Review, 23, 640-651.
45.
Wechsler, D. (1991). Wechsler Intelligence Scale for Children-Third edition. San Antonio, TX: The Psychological Corporation.
46.
Wielkiewicz, R. M. (1990). Interpreting low scores on the WISC-R third factor: It's more than distractibility. Psychological Assessment, 2, 91-97.
47.
Wielkiewicz, K. R. , & Daood, C.J. (1993). Correlations between WISC-R subtests and scales of the Personality Inventory for Children. Psychological Reports, 73, 1343-1346.
48.
Wiggins, J. S. (1973). Personality and prediction: Principles of personality assessment. Reading, MA: Addison-Wesley.
49.
Wilson, M. S. , & Reschly, D. J. (1996). Assessment in school psychology training and practice. School Psychology Review, 25, 9-23.
Youngstrom, E. A. , Kogos, J. L., & Glutting, J. J. (1999). Incremental efficacy of differential% ability scales factor scores in predicting individual achievement criteria. School Psychology Quarterly, 14, 26-39.
