Department of Psychiatry
Penn Behavioral Health

Center for the Treatment and Study of Anxiety

subpage feature

subpage feature

Welcome to the CTSA

The Center for the Treatment and Study of Anxiety at the University of Pennsylvania is...

An internationally renowned treatment research center dedicated to developing, refining, and testing state-of-the-art therapies for anxiety and traumatic stress disorders.

A world recognized clinic, which provides evidence-based cognitive-behavioral therapy to children, adolescents, and adults with anxiety disorders.

A well-established resource for professionals, offering specialized training in the treatment of anxiety disorders to health professionals around the world.

We welcome referrals from professionals and inquiries directly from patients.


CTSA in the News

December 2013: JAMA publishes RCT findings about PE for adolescent girls

Published in JAMA, Journal of the American Medical Association: Adolescents girls with sexual abuse–related PTSD experienced greater benefit from prolonged exposure therapy than from supportive counseling even when delivered by counselors who typically provide supportive counseling.   Click here for full article.


November 2013:  JAMA Psychiatry publishes OCD augmentation RCT findings

Randomzied clinical trial: Cognitive-Behavioral Therapy vs Risperidone for Augmenting Serotonin Reuptake Inhibitors in Obsessive-Compulsive Disorder.  Findings suggest that augmenting SRI medication treatment for OCD with Exposure and Response Prevention (Ex/RP) helped reduce OCD symptoms and improve insight, functioning, and quality of life. Click here for full article.


August 2013: JAMA publishes RCT findings about treatment of PTSD comorbid with alcohol dependence (Foa et al.)

Published in JAMA, Journal of the American Medical Association: Contrary to past concerns, using prolonged exposure therapy to treat patients with post-traumatic stress disorder (PTSD) and comorbid alcohol dependence does not increase drinking or cravings.  In a first-of-its-kind single-blind, randomized clinical trial, researchers also found that PTSD patients treated with the drug naltrexone for alcohol dependence drank less—and that the use of prolonged exposure therapy and naltrexone better protects  PTSD patients from relapse after treatment stops.  Click here for full article. 


2014: Prolonged Exposure Workshop in Copenhagen

In September 2014, Dr. Foa will travel to Copenhagen, Denmark to present a workshop on Prolonged Exposure Therapy. For more information, click here.


CTSA launches Youtube Channel

The Center has launched a Youtube channel dedicated to sharing videos from workshops, trainings, and lectures, as well as discussion topics related to new research and evidence-based treatment of anxiety.  To view videos, check our our CTSA Youtube Channel.  


TIME Magazine Honors Dr. Edna Foa, Center Director

TIME magazine named Edna Foa, PhD, to the 2010 TIME 100, the magazine's annual list of the 100 most influential people in the world. Dr. Foa was recognized for her outstanding contributions in the area of treatment research for posttraumatic stress disorder (PTSD). Read more about Dr. Foa's accomplishments...

Studies and

Treatment Study for Adults with Obsessive-Compulsive Disorder (OCD)

We are currently enrolling adults between 18 and 75 who are experiencing symptoms of Obsessive-Compulsive Disorder and who are currently taking medication for their OCD. Please contact Liza for more information at 215-746-3327, or click here for more information.

Training Opportunities for Professionals


The Center for the Treatment and Study of Anxiety offers a number of professional workshops for mental health practioners who are looking to extend their training in empirically-supported treatments for anxiety disorders. Our current workshop offerings include Prolonged Exposure (PE) for PTSD, PE Supervisor Workshops, and Exposure and Response Prevention (EX/RP) for OCD. Please visit our Information for Professionals page to learn more about our training opportunities.

Volunteer Opportunities


The Center for the Treatment and Study of Anxiety accepts emails from students interested in volunteering at our center. Volunteers must be available at least 10 hours per week. Volunteer responsibilities include assisting project coordinators with preparing treatment materials, maintaining study databases, assisting on recruitment for studies, and performing various administrative tasks. A background and strong interest in psychology is preferred. This position is ideal for undergraduate psychology majors looking to gain more experience in the field. If interested, please contact Dr. Daniel Chazin at