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Date of Award


Degree Type

Thesis (On-Campus Access Only)

Degree Name

Master of Science in Clinical Psychology (MSCP)

Committee Chair

Ricks Warren, PhD, ABPP

Second Advisor

Michel Hersen, PhD, ABPP


The current study investigated the long-term effectiveness of an empirically supported treatment for panic disorder administered in a private practice setting. Participants were 100 clients with a primary diagnosis of panic disorder with or without agoraphobia who received Panic Control Treatment. Clients achieved substantial, clinically meaningful gains that were maintained at follow-up assessment points. At follow-up, 89% of the sample were panic free and the mean value of each self-report measure used in the study was significantly lower than pretreatment. There were virtually no significant differences between posttreatment and follow-up measures. Normative comparisons and high endstate functioning demonstrated a similar pattern of effectiveness. The magnitude of improvement appears comparable to that reported in efficacy trials. In addition, cross-sectional vs. longitudinal methods of analysis were examined.