Citation

Orlando M, Marshall GN. Psychol. Assess. 2002; 14(1): 50-59.

Affiliation

RAND, 1700 Main Street, P.O. Box 2138, Santa Monica, California 90407-2138, USA. orlando@rand.org

Copyright

(Copyright © 2002, American Psychological Association)

DOI

unavailable

PMID

11911049

Abstract

This study demonstrated the application of an innovative item response theory (IRT) based approach to evaluating measurement equivalence, comparing a newly developed Spanish version of the Posttraumatic Stress Disorder Checklist-Civilian Version (PCL-C) with the established English version. Basic principles and practical issues faced in the application of IRT methods for instrument evaluation are discussed. Data were derived from a study of the mental health consequences of community violence in both Spanish speakers (n = 102) and English speakers (n = 284). Results of differential item functioning (DIF) analyses revealed that the 2 versions were not fully equivalent on an item-by-item basis in that 6 of the 17 items displayed uniform DIF. No bias was observed, however, at the composite PCL-C scale score, indicating that the 2 language versions can be combined for scale-level analyses.

Language: en