Date Approved

4-16-2010

Date Posted

9-27-2013

Degree Type

Open Access Dissertation

Degree Name

Doctor of Philosophy (PhD)

Department or School

Psychology

Committee Member

Dean Lauterbach, Ph.D., Chair

Committee Member

John Knapp, Ph.D.

Committee Member

Ellen Koch, Ph.D.

Committee Member

David C. S. Richard, Ph.D.

Abstract

The most commonly used interview for posttraumatic stress disorder (PTSD) is the Clinician-Administered PTSD Scale (CAPS), a semi-structured interview patterned after the DSM-IV criteria (Blake et al., 1990). The Computerized PTSD Scale – Multimedia Version (CPS-M: Richard, Mayo, Bohn, Haynes, & Kolman, 1997) is a computerized interview that is modeled after the CAPS. This study examined how well the CPS-M agreed with the CAPS diagnostically in a clinical sample. Ninety veterans completed the test protocol consisting of paper-and-pencil measures, the CPS-M, and the CAPS interview. Correlations between the CAPS and CPS-M were high at the item, subscale, and full-scale levels. Confidence interval analysis revealed that the CPS-M scales were not significantly different from their CAPS counterparts but failed to establish equivalence. Alpha scores for the scales indicated good internal consistency on both the CAPS and CPS-M. Difference scores between the two instruments were normally distributed, and scale effect sizes were negligible. ROC curve analysis for the CPS-M revealed high diagnostic accuracy. These results present a strong case for more widespread use of the CPS-M in the assessment of PTSD.

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