What the Itpa Measures: a Synthesis of Factor Studies of the 1961 Edition

Carlson, D. C. and Meyers, C. E. Language, Memory and Figural Ability Hypotheses in Mental Retardates of Mental Age Four. American Journal of Mental Deficiency, 1968, 73, 105-112.

Center, W. R. A Factor Analysis of Three Language and Communication Batteries. Unpublished doctoral dissertation, University of Georgia, 1963.

Haring, N. J. and Ridgway, R. W. Early Identification of Children with Learning Disabilities . Exceptional Children, 1967, 33, 387-395.

Horner, R. D. A Factor Analysis of the ITPA and the PLS with Mentally Retarded Children. Exceptional Children, 1967, 34, 183-189.

Kaiser, H. F. The Varimax Criterion for Analytic Rotation in Factor Analysis. Psychometrika, 1958, 23, 187-200.

Levanthal, D. S. and Stedman, D. J. A Factor Analytic Study of the Performance of 340 Disadvantaged Children on the Illinois Test of Psycholinguistic Abilities . Durham, N. C.: Duke University, the Education Improvement Program. Paper presented at the convention of the Society for Research in Child Development, New York, 1967.

Loeffler, F. J. An Extension and Partial Replication of Meyers et al.'s. Primary Abilities at Mental Age Six. Paper presented at the biennial meeting of the Society for Research in Child Development, Berkeley, California, April, 1963.

Cited in Bateman, B. The Illinois Test of Psycholinguistic Abilities in Current Research: Summaries of Studies, University of Illinois, 1965.

McCarthy, J. J. and Kirk, S. The Construction, Standardization and Statistical Characteristics of the Illinois Test of Psycholinguistic Abilities. Urbana : Institute for Research on Exceptional Children, 1963.

McCarthy, J. J. and Olson, J. L. Validity Studies on the Illinois Test of Psycholinguistic Abilities. Madison, Wisconsin: Photo Press, Inc., Xerlith Service, 1964.

McCartin, R. A., Sr. and Meyers, C. E. An Exploration of Six Semantic Factors at First Grade. Multivariate Behavioral Research, 1966, 1, 79-94.

Meeker, M. and Meyers, C. E. Memory Factors and School Success of Average and Special Groups of Ninth Grade Boys. Genetic Psychology Monographs , 1969. (in press)

Meyers, C. E. Factor Analytic Study of Intercorrelational Data of McCarthy and Olson (1964) on the ITPA. Unpublished study, Pacific State Hospital, 1966.

Meyers, C. E. , Sitkei, E. G. , and Watts, C. W. Further Ability Factors in Normal Children of Six Years. Unpublished data, Pacific State Hospital.

Orpet, R. E. and Meyers, C. E. Six Structure of Intellect Hypotheses in Six Year Old Children. Journal of Educational Psychology, 1966, 57, 341-346.

Quereshi, M. Y. Patterns of Psycholinguistic Development During Early and Middle Childhood. EDUCATIONAL AND PSYCHOLOGICAL MEASUREMENT, 1967,27,353-365.

Ryckman, D. B. Psychological Processes of Disadvantaged Children. Unpublished doctoral dissertation, University of Illinois, Ann Arbor, Michigan: University Microfilms, 1966, No. 66-12, 417.

Semmel, M. I. and Mueller, M. W. A Factor Analysis of the Illinois Test of Psycholinguistic Abilities with Mentally Retarded Children. Unpublished study, George Peabody College, 1962.

Cited in Bateman, B. The Illinois Test of Psycholinguistic Abilities in current research: Summaries of studies. University of Illinois, 1965.

Sitkei, E. G. and Meyers, C. E. Comparative Structure of Intellect in Middle and Lower Class Four-Year Olds of Two Ethnic Groups. Developmental Psychology, 1969, 1, 592-604.

Strong, R. T. Factorial Analyses of Psycholinguistic Abilities in Mentally Retarded Youth: One-Common Factor Solution. Preliminary draft, Columbus State School. Paper presented at the Eighty-eighth Annual Meeting of the American Association of Mental Deficiency, KansasCity, 1964 .