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Test Selection and Suppressor Variables

Published online by Cambridge University Press:  01 January 2025

Robert J. Wherry
Robert J. Wherry*
Affiliation:
University of North Carolina
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Abstract

A theoretical discussion of the factor pattern of predictor tests and criterion shows that ordinary test selection methods break down under certain circumstances. It is shown that maximal results may not occur if suppressor variables are present among the predictors. Suggested solutions to the problem include: (1) prior item analysis of tests against the criterion, (2) selection of several trial batteries including some with suppressor variables on the basis of a factor analysis of tests and criterion, (3) modification of the usual test selection procedures to include separate solutions based upon each of several starting variables, or (4) the cumbersome and tedious solution of all possible combinations of predictors. The solutions are recommended in the order named above. Although all of the suggested solutions involve added labor and may not be necessary, the test or battery constructor should at least be aware of the problem.

Type
Original Paper
Information
Psychometrika , Volume 11 , Issue 4 , December 1946 , pp. 239 - 247
Copyright
Copyright © 1946 The Psychometric Society

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References

McNemar, Q. The mode of operation of suppressant variables. Amer. J. Psychol., 1945, 58, 554–555.CrossRefGoogle Scholar
Meehl, P. E. A simple algebraic development of Horst's suppressor variables. Amer. J. Psychol., 1945, 58, 550–554.CrossRefGoogle Scholar
Stead, Shartl.et al. Occupational counseling techniques, Appendix V (pp. 245–252). New York: American Book Co., 1940.Google Scholar
Toops, H. A. The L-Method. Psychometrika, 1941, 6, 249–266.CrossRefGoogle Scholar
Wherry, R. J. and Gaylord, R. H. The concept of test and item reliability in relation to factor pattern. Psychometrika, 1943, 8, 247–269.CrossRefGoogle Scholar
Wherry, R. J. and Gaylord, R. H. Test selection with integral gross score weights. Psychometrika, 1946, 11, 173–183.CrossRefGoogle Scholar