Long-term stability of the Wechsler Intelligence Scale for Children-Third Edition was investigated separately across gender, race/ethnicity, and age subgroups. Participants were 642 students from 33 states evaluated twice for special education eligibility over a mean test-retest interval of 2.83 years. Gender, race/ethnicity, and age produced few or no differential effects on long-term stability coefficients. Most of the demographic subgroup stability coefficients for VIQ, PIQ FSIQ VCI, and POI scores demonstrated satisfactory long-term stability. However, stability coefficients for FDI, PSI, and VIQ-PIQ discrepancy scores were not adequate. Mean differences from first testing to second testing were either not statistically significant or not clinically meaningful for all groups, except Hispanic/Latino youths. Analysis of individual change scores indicated that only the FSIQ was sufficiently stable for use with individual students. Results extended those of Canivez and Watkins (1998), supporting long-term stability for the WISC-III among most demographic subgroups studied.
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References
1.
Anderson, P. L. , Cronin, M. E., & Kazmierski, S. (1989). WISC-R stability and re-evaluation of learning-disabled students. Journal of Clinical Psychology, 45, 941-944.
2.
Bauman, E. (1991). Stability of WISC-R scores in children with learning difficulties. Psychology in the Schools, 28, 95-99.
3.
Bolen, L. M. (1998). WISC-III score changes for EMH students. Psychology in the Schools, 35, 327-332.
4.
Canivez, G. L. , & Watkins, M. W. (1998). Long term stability of the WISC-III. Psychological Assessment, 10, 285-291.
5.
Cassidy, L. C. (1997). The stability of WISC-III scores: For whom are triennial re-evaluations necessary? Unpublished doctoral dissertation, University of Rhode Island.
6.
Cohen, J. (1988). Statistical power analysis for the behavioral sciences (2nd ed.). Hillsdale, NJ: Erlbaum.
7.
Coleman, J. C. (1963). Stability of intelligence test scores in learning disorders. Journal of Clinical Psychology, 19, 295-298.
8.
Conklin, R. C. , & Dockrell, W. B. (1967). The predictive validity and stability of WISC scores over a four-year period. Psychology in the Schools, 4, 263-266.
9.
Covin, T. M. (1977). Stability of the WISC-R for 9-year-olds with learning difficulties. Psychological Reports, 40, 1297-1298.
10.
Elliott, S. N. , & Boeve, K. (1987). Stability of WISC-R IQs: An investigation of ethnic differences over time. Educational and Psychological Measurement, 47, 461-465.
11.
Elliott, S. N. , Piersol, W. C., Witt, J. C., Argulewicz, E. N., Gutkin, T. B., & Galvin, G. A. (1985). Three-year stability of WISC-R IQs for handicapped children from three racial/ethnic groups. Journal of Psychoeducational Assessment, 3, 233-244.
12.
Ellzey,J. T. , & Karnes, F. A. (1990). Test-retest stability of WISC-R IQs among young gifted students. Psychological Reports, 66, 1023-1026.
13.
Friedman, R. (1970). The reliability of the Wechsler Intelligence Scale for Children in a group of mentally retarded children. Journal of Clinical Psychology, 26, 181-182.
14.
Gehman, I. H. , & Matyas, R. P. (1956). Stability of the WISC and Binet tests. Journal of Consulting Psychology, 20, 150-152.
15.
Guilford, J. P. , & Fruchter, B. (1978). Fundamental statistics in psychology and education. New York: McGraw-Hill.
16.
Haynes, J. P. , & Howard, R. C. (1986). Stability of WISC-R scores in a juvenile forensic sample. Journal of Clinical Psychology, 42, 534-537.
17.
Hills, J. R. (1981). Measurement and evaluation in the classroom (2nd ed.). Columbus, OH: Merrill.
18.
Irwin, D. O. (1966). Reliability of the WISC. Journal of Educational Measurement, 3, 287-292.
19.
Jensen, A. R. (1980). Bias in mental testing. New York: Free Press.
20.
Kaufman, A. S. (1994). Intelligent testing with the WISC-III. New York: Wiley.
21.
McDermott, P. A. (1988). Agreement among diagnosticians or observers: Its importance and determination. Professional School Psychology, 3, 225-240.
22.
Moffitt, T. E. , Caspi, A., Harkness, A. R., & Silva, P. A. (1993). The natural history of change in intellectual performance: Who changes? How much? Is it meaningful?Journal of Child Psychology and Psychiatry, 34, 455-506.
23.
Naglieri, J. A. , & Pfeiffer, S. I. (1983). Reliability and stability of the WISC-R for children with below average IQs. Educational and Psychological Research, 3, 203-208.
24.
Oakman, S. , & Wilson, B. (1988). Stability of WISC-R intelligence scores: Implications for 3-year reevaluations of learning disabled students. Psychology in the Schools, 25, 118-120.
25.
Quereshi, M.J. (1968). Practice effects of the WISC subtest scores and IQ estimates. Journal of Clinical Psychology, 24, 79-85.
26.
Reger, R. (1962). Repeated measurement with the WISC. Psychological Reports, 11, 418.
27.
Rogers, M. R. (1998). Psychoeducational assessment of culturally and linguistically diverse children and youth. In H. B. Vance (Ed.), Psychological assessment of children: Best practices for school and clinical settings (2nd ed.; pp. 355-384). New York: Wiley.
28.
Rosen, M. , Stallings, L., Floor, L., & Nowakiwska, M. (1968). Reliability and stability of Wechsler IQ scores for institutionalized mental subnormals. American Journal of Mental Deficiency, 73, 218-225.
29.
Salvia, J. , & Ysseldyke, J. E. (1991). Assessment (5th ed.). Boston: Houghton Mifflin.
30.
Sattler, J. (1992). Assessment of children (Rev. 3rd ed.). San Diego, CA: Author.
31.
Smith, M. D. (1978). Stability of WISC-R subtest profiles for learning-disabled children. Psychology in the Schools, 15, 4-7.
32.
Stavrou, E. (1990). The long-term stability of WISC-R scores in mildly retarded and learning-disabled children. Psychology in the Schools, 27, 101-110.
33.
Stavrou, E. , & Flanagan, R. (1996, March). The stability of WISGIII scores in learning disabled children. Paper presented at the Annual Convention of the National Association of School Psychologists, Atlanta, GA.
34.
Stinnett, T. A. , Havey, J. M., & Oehler-Stinnett, J. (1994). Current test usage by practicing school psychologists: A national survey. Journal of Psychoeducational Assessment, 12, 331-350.
35.
Throne, F. M. , Schulman, J. L., & Kaspar, J. C. (1962). Reliability and stability of the WISC for a group of mentally retarded boys. American Journal of Mental Deficiency, 67, 455-457.
36.
Truscott, S. D. , Narrett, C. M., & Smith, S. E. (1994). WISC-R subtest reliability over time: Implications for practice and research. Psychological Reports, 74, 147-156.
37.
Tuma, J. M. , & Appelbaum, A. S. (1980). Reliability and practice effects of WISC-R IQ estimates in a normal population. Educational and Psychological Measurement, 40, 671-678.
38.
Vance, H. B. , Blixt, S., Ellis, R., & Debell, S. (1981). Stability of the WISC-R for a sample of exceptional children. Journal of Clinical Psychology, 37, 397-399.
39.
Vance, H. B. , Hankins, N., & Brown, W. (1987). A longitudinal study of the Wechsler Intelligence Scale for Children-Revised over a six-year period. Psychology in the Schools, 24, 229-233.
40.
Walker, K. P. , & Gross, F. L. (1970). IQ stability among educable mentally retarded children. Training School Bulletin, 66, 181-187.
41.
Watkins, C. E., Jr. , Campbell, V. L., Nieberding, R., & Hallmark, R. (1995). Contemporary practice of psychological assessment by clinical psychologists. Professional Psychology: Research and Practice, 26, 54-60.
42.
Webster, R. E. (1988). Statistical and individual temporal stability of the WISC-R for cognitively disabled adolescents. Psychology in the Schools, 25, 365-372.
43.
Wechsler, D. (1949). Manual for the Wechsler Intelligence Scale for Children. New York: The Psychological Corporation.
44.
Wechsler, D. (1974). Manual for the Wechsler Intelligence Scale for Children-Revised. New York: The Psychological Corporation.
45.
Wechsler, D. (1991). Manual for the Wechsler Intelligence Scale for Children-Third Edition. San Antonio, TX: The Psychological Corporation.
46.
Whatley, R. G. , & Plant, W. T. (1957). The stability of the WISC IQs for selected children. Journal of Psychology, 44, 165-167.
47.
Whorton, J. E. (1985). Test-retest Wechsler Intelligence Scale for Children-Revised scores for 310 educable mentally retarded and specific learning disabled students. Psychological Reports, 56, 857-858.
48.
Zhu, J. , Woodell, N. M., & Kreiman, C. L. (1997, August). Three-year re-evaluation stability of the WISC-III: A learning disabled sample. Paper presented at the Annual Convention of the American Psychological Association, Chicago.
