The purpose of the study is to see if "Behavioral Activation and Social Engagement for PTSD" (BASE for PTSD), an individual therapy for PTSD, will help Veterans with PTSD 1) through improved understanding of how PTSD affects them, 2) by reducing ways in which they avoid meaningful activity due to PTSD, 3) by enabling them to do more of the things they really care about, and 4) by improving, strengthening, and building up their social supports.

Posttraumatic stress disorder (PTSD) is a mental health condition that some people develop following exposure to a traumatic event. PTSD often results in a reduction in feelings of connection to other people and changes in views about others, as well as reduced participation in valued activities. Many veterans with PTSD do not seek treatment offered in specialty mental health settings and may forgo treatment of any kind.

This study is an open-trial format (no comparison condition) of U.S. military veterans who will participate in a brief psychotherapy treatment for PTSD offered in a Primary Care setting. This is a pilot trial to see if the treatment is effective at reducing symptoms of PTSD and increasing feelings of social support, and an exploratory aim is to see if veterans engage in additional treatment after completing this treatment.

Inclusion Criteria:

• Veterans who:

  1. are currently enrolled in either of the Primary Care Clinics (including Women's Clinic) or Primary Care Mental Health Integration clinic at VA Puget Sound Health Care System - Seattle Division
  2. meet criteria for clinical or subclinical PTSD
  3. are willing to have therapy sessions audiotaped for the purposes of supervision
  4. plan to live in the Seattle area for 6 months following entry into the study

Exclusion Criteria:

• Veterans who:

  1. exhibit the presence of severe mental illness diagnosis (e.g., active psychosis and/or uncontrolled bipolar disorder)
  2. have been a psychiatric in-patient admission in the past 30 days
  3. have had a suicide attempt in the last 60 days
  4. have had a plan or intent to harm self or others in the last 30 days
  5. have a behavioral flag in their medical record
  6. have had a psychiatric medication dosing or receipt that has changed in the last 30 days
  7. are unwilling to provide at least 1 collateral contact
  8. have impaired decision making capacity (as measured by evidence in the Computerized Patient Record System record of moderate-severe Traumatic Brain Injury, uncontrolled psychosis, dementia, communication flag, or by clinical judgment in speaking with the participant
  9. are prisoners
  10. are illiterate or have limited or no English proficiency
  11. are terminally ill
  12. are currently participating in Cognitive Processing Therapy (CPT) or Prolonged Exposure Therapy (PE)