Date of Submission

2002

Degree Type

Dissertation

Degree Name

Doctor of Psychology (PsyD)

Department

Psychology

Department Chair

Arthur Freeman, Ed.D., ABPP

First Advisor

Elizabeth Gosch, Ph.D., Chairperson

Second Advisor

Rosemary Mennuti, Ed.D.

Third Advisor

Bruce Zahn, Ed.D, ABPP

Abstract

According to the Hybrid Model of Executive Function for Attention Deficit Hyperactivity Disorder (ADHD), hyperactive and combined types, a delay in behavior inhibition causes secondary deficits in four executive function; non-verbal working memory, verbal working memory, reconstitution and self-regulation of affect/motivation/arousal. The deficit in non-verbal working memory causes a deficit in psychological sense of time, which in tum impairs self-regulation in those with ADHD. This single case study investigated concurrent deficits in behavior inhibition, non-verbal working memory and psychological sense of time in a 1O-year-old male with ADHD, combined type. Three interrelated components of behavior inhibition were measured by the Continuous Performance Test-II, The Wisconsin Card Sorting Test, and the Stroop Test. Non-verbal working memory was measured by using the Rey-Complex Figure Test and Recognition Trial, and the psychological sense of time was measured by the Time Perception Test, which is a time reproduction task. The results of this case study supports the Hybrid Model of Executive Function as concurrent deficits in behavior inhibition, non-verbal working memory and psychological sense of time were found in a subject with ADHD, combined type. The implications of these findings for treatment and future research are discussed.

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