Defense Date


Document Type


Degree Name

Master of Science


Clinical Psychology

First Advisor

Bruce Rybarczyk


Clinical research on insomnia has observed that many individuals with this sleep disorder exhibit a significant discrepancy between their subjective reports of symptom severity and objective measures of the same parameters. This study sought to more closely examine this discrepancy by comparing sleep diary estimates with polysomnography data in a population of 60 older adults with comorbid insomnia. Consistent with previous research, results show that participants significantly underestimated sleep efficiency and total sleep time and significantly overestimated sleep onset latency. Participants receiving CBT-I exhibited significantly reduced discrepancy at post-treatment, particularly with regard to sleep latency, compared to those in a Stress Management and Wellness treatment control group. This suggests that the treatment effects observed as a result of CBT can be partly explained by improvements in the accuracy of sleep estimation. Additionally, high discrepancy at baseline was found to be a significant predictor of positive treatment outcome, indicating that sleep misperception is a potential factor in a favorable treatment response to CBT.


© The Author

Is Part Of

VCU University Archives

Is Part Of

VCU Theses and Dissertations

Date of Submission

April 2011