Date Approved

12-14-2007

Date Posted

10-1-2013

Degree Type

Open Access Dissertation

Degree Name

Doctor of Philosophy (PhD)

Department

Psychology

Committee Member

Dean Lauterbach, Ph.D., Chair

Committee Member

Norman Gordon, Ph.D.

Committee Member

John Knapp, Ph.D.

Committee Member

David C. S. Richard, Ph.D.

Committee Member

Amy Young, Ph.D.

Abstract

This study investigated the psychometric properties of the Computerized PTSD Scale-Multimedia Version (CPS-M: Richard, Mayo, Bohn, Haynes, & lll Kolman, 1997), a self-administered adaptation of the Clinician-Administered PTSD Scale (CAPS: Blake, Weathers, Nagy, Kaloupek, Klauminzer, Charney, & Keane, 1990). The sample included 161 participants from both a veteran's hospital and from a large urban outpatient HMO system who reported a history of trauma. Indices of internal consistency reliability (i.e., inter-item correlations, item-scale correlations, coefficient alpha) and temporal stability fell in satisfactory ranges. To assess convergent and discriminant validity, correlations were calculated between the CPSM and the following instruments: Purdue PTSD Scale, Beck Depression Inventory II (BDI-II), Hospital Anxiety and Depression Scale (HADS), Yale-Brown Obsessive Compulsive Scale (YBOCS), and Antisocial Behavior Inventory (ASBI). As hypothesized, the CMS-M was most strongly correlated with another measure of PTSD (r = .90) followed by the BDI-II (r = .85), HADS (r = .79), YBOCS (r = .71), and ASBI (r = .25). Confirmatory factor analysis procedures were used to assess fit of a set of nested measurement models. The fit of four different measurement models was tested. An oblique four-factor, first order model composed of reexperiencing (Bl-B5), avoidance (Cl-C2), dysphoria (C3-C7 & Dl-D3), and hyperarousal (D4- D5) provided the best fit to the data.

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