Date of Award


Degree Name

Doctor of Philosophy



First Advisor

Chwalisz, Kathleen


Identification of Attention Deficit/Hyperactivity Disorder (AD/HD) in adults using the Personality Assessment Inventory (PAI) T-scores was investigated. Archival data from closed client files at a university counseling center were used to obtain information from 91 cases of individuals who received testing services and were diagnosed with AD/HD and 91 cases that received personal counseling and received a DSM-IV diagnosis but not a diagnosis of AD/HD. All cases had taken the PAI as part of the intake process. Four groups were identified; three AD/HD groups (Inattentive type, Combined type, & Not otherwise Specified) and a control group of counseling cases without an AD/HD diagnosis. The AD/HD-NOS group was excluded from the study due to the small group size of six. A MANOVA resulted in significance differences between the AD/HD-I and AD/HD-C groups; therefore, they were analyzed as separate groups. A MANOVA comparing the AD/HD groups and the control group revealed significance differences using select PAI clinical scales hypothesized to capture AD/HD symptoms. Descriptive and predictive discriminant function analyses (DFA) with a set of PAI subscales hypothesized to most relate to adult symptoms of AD/HD were significant, with modest results. DFA revealed a hit rate of 71.4% for prediction of clients with AD/HD-I; 30.8% for predicting AD/HD-C, and 78.9% predicting no AD/HD. Cut-off scores for AD/HD were suggested for four PAI scales. Strengths and limitations were discussed.




This dissertation is only available for download to the SIUC community. Current SIUC affiliates may also access this paper off campus by searching Dissertations & Theses @ Southern Illinois University Carbondale from ProQuest. Others should contact the interlibrary loan department of your local library or contact ProQuest's Dissertation Express service.