Fitting a Two-Parameter Logistic Item Response Model to Clarify the Psychometric Properties of the Drug Use Screening Inventory for Adolescent Alcohol and Drug Abusers

Authors

  • Levent Kirisci,

    Corresponding author
    1. Pittsburgh Adolescent Alcohol Research Center and the Department of Psychiatry, Western Psychiatric Institute and Clinic, University of Pittsburgh Medical School, Pittsburgh, Pennsylvania.
      Reprint requests: Levent Kirisci, Ph.D., Pittsburgh Adolescent Alcohol Research Center, Department of Psychiatry (WPIC), 3811 O'Hara Street, University of Pittsburgh Medical School, Pittsburgh, PA 15213.
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  • Ralph E. Tarter,

    1. Pittsburgh Adolescent Alcohol Research Center and the Department of Psychiatry, Western Psychiatric Institute and Clinic, University of Pittsburgh Medical School, Pittsburgh, Pennsylvania.
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  • Tse-Chi Hsu

    1. Department of Psychology in Education, University of Pittsburgh, Pittsburgh, Pennsylvania.
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  • This study was supported by grants from the National Institute on Alcohol Abuse and Alcoholism (AA 08746) and the National Institute on Drug Abuse (DA 05605 and DA 05952).

Reprint requests: Levent Kirisci, Ph.D., Pittsburgh Adolescent Alcohol Research Center, Department of Psychiatry (WPIC), 3811 O'Hara Street, University of Pittsburgh Medical School, Pittsburgh, PA 15213.

Abstract

The suitability of fitting a two-parameter logistic item response model to the Drug Use Screening Inventory (DUSI) was assessed. In a sample of 846 adolescents, each of the 10 domains was found to be unidimensional. Invariance of the item parameters across different groups was also observed. The reliability coefficient, based on item response theory, was found to be superior. The results of these analyses indicate that the DUSI has sound psychometric properties.

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