Title

Correlates of Person Fit and Effect of Person Fit on Test Validity

Publication Type

Journal Article

Publication Date

1-1999

Abstract

Person-fit indices (lz and multitest lzm) derived from item response theory and used to identify misfitting examinees were computed based on responses to cognitive ability and personality tests. lz indices from different ability domains within the cognitive tests were uncorrelated with each other; lz indices from different tests within the personality domain were moderately intercorrelated. Cross-domain correlations were near 0. Test-taking motivation and conscientiousness were correlated moderately with multitest lzm for personality tests and to a lesser extent for cognitive tests. Test reactions were uncorrelated with any of the lz measures. Males had higher mean lz s than females. This difference could be partly attributed to differences in conscientiousness. African-Americans had higher mean lz than Whites. This effect could not be accounted for by test-taking motivation or conscientiousness. High values of lz affected the criterion-related validity of the set of cognitive tests such that the validity estimate decreased as lz increased.

Keywords

Aberrant test item responses, fit indices, person fit, subgroup differences, test motivation, test reactions

Discipline

Applied Behavior Analysis

Research Areas

Psychology

Publication

Applied Psychological Measurement

Volume

23

Issue

1

First Page

41

Last Page

53

ISSN

0146-6216

Identifier

10.1177/01466219922031176

Publisher

SAGE

Additional URL

http://dx.doi.org/10.1177/01466219922031176

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