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Date of Award

7-29-2005

Degree Type

Thesis (On-Campus Access Only)

Degree Name

Master of Science in Clinical Psychology (MSCP)

Committee Chair

Michael S. Daniel

Second Advisor

James B. Lane

Abstract

The present study investigated the validity of Minnesota Multiphasic Personality Inventory-Second Edition (MMPI-2) for clients with Attention-DeficitiHyperactivity Disorder (ADHD). Scores for three validity and nine clinical scales were compared in two phases. First, two matched samples were compared (N = 17 per group), clients with 2 . ADHD only and clients with mixed distress only. Overall analyses indicated no significant differences between the groups' raw scores; the mean T-scores for the ADHD group were in the normal range (i.e. < 65). Second, three unmatched samples were compared: (1.) clients with ADHD only (N = 19), (2.) clients with mixed distress only (N = 95), and (3.) clients with comorbid ADHD and mixed distress (N = 14). Analyses indicated one significant raw score difference on scale Pa, on which the comorbid group scored significantly higher than the ADHD only group. The mean T-scores for the ADHD group were in the normal range while mean T -scores for the comorbid group were clinically elevated on six scales. These findings indicate that, as a group, individuals with ADHD do not have significantly elevated scores on theMMPI-2.

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