Clarissa W. Ong
Ph.D., Utah State University, 2021
Assistant Professor and Director of the Psychology Clinic
Mailing Address:
Department of Psychology
University of Toledo
2801 West Bancroft St.
Toledo, Ohio 43606-3390
Process-Oriented Intervention Science (POIS) Lab
Dr. Ong's CV can be viewed here.
Dr. Ong will not be accepting students for the Fall of 2024.
Research Interests
- Process-based therapy
- Acceptance and commitment therapy
- Obsessive-compulsive and related presentations (e.g., perfectionism, hoarding)
- Internet-based treatment
- Assessment and measure performance
Selected Publications
Ong, C. W., Pierce, B. G., Klein, K. P., Hudson, C. C., Beard, C., & Björgvinsson, T. (2021). Longitudinal measurement invariance of the PHQ-9 and GAD-7. Assessment. https://doi.org/10.1177/10731911211035833
Ong, C. W., Krafft, J., Panoussi, F.†, Petersen, J. M., Levin, M. E., & Twohig, M. P. (2021). In-person and online-delivered acceptance and commitment therapy for hoarding disorder: A multiple baseline study. Journal of Contextual Behavioral Science, 20, 108-117. https://doi.org/10.1016/j.jcbs.2021.02.001
Ong, C. W., Levin, M. E., & Twohig, M. P. (2020). Beyond acceptance and commitment therapy: Process-based therapy. The Psychological Record, 70, 637-648. https://doi.org/10.1007/s40732-020-00397-z
Ong, C. W., Blakey, S. M., Smith, B. M., Morrison, K. L., Bluett, E. J., Abramowitz, J. S., & Twohig, M. P. (2020). Moderators and processes of change in traditional exposure and response prevention (ERP) versus acceptance and commitment therapy-informed ERP for obsessive-compulsive disorder. Journal of Obsessive-Compulsive and Related Disorders, 24, 100499. https://doi.org/10.1016/j.jocrd.2019.100499
Ong, C. W., Lee, E. B., Krafft, J., Terry, C. L., Barrett, T. S., Levin, M. E., & Twohig, M. P. (2019). A randomized controlled trial of acceptance and commitment therapy for clinical perfectionism. Journal of Obsessive-Compulsive and Related Disorders, 22, 100444. https://doi.org/10.1016/j.jocrd.2019.100444
Ong, C. W.*, Pierce, B. G.*, Woods, D. W., Twohig, M. P., & Levin, M. E. (2018). The Acceptance and Action Questionnaire – II: An item response theory analysis. Journal of Psychopathology and Behavioral Assessment, 41, 123-134. https://doi.org/10.1007/s10862-018-9694-2 (*co-first authors)
Ong, C. W., Clyde, J. W., Bluett, E. J., Levin, M. E., & Twohig, M. P. (2016). Dropout rates in exposure with response prevention for obsessive-compulsive disorder: What do the data really say? Journal of Anxiety Disorders, 40, 8-17. http://dx.doi.org/10.1016/j.janxdis.2016.03.006