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Comment & Response
June 19, 2018

Motivation to Participate in PTSD Research

Author Affiliations
  • 1Department of Psychiatry and Behavioral Sciences, Stanford University School of Medicine, Stanford, California
  • 2Department of Psychological and Brain Sciences, Boston University, Boston, Massachusetts
JAMA. 2018;319(23):2439-2440. doi:10.1001/jama.2018.4326

To the Editor The randomized clinical trial by Dr Foa and colleagues1 compared massed prolonged exposure therapy, spaced prolonged exposure therapy, present-centered therapy, and a minimal-contact control on severity of posttraumatic stress disorder (PTSD) among active duty military personnel. The results were different from what was expected from previous studies.2 Individuals receiving spaced therapy did no better than those randomized to present-centered therapy, a comparison condition to control for common factors in psychotherapy. Foa and colleagues and the Editorial by Hoge and Chard3 were unable to explain these results.