Group Written Exposure Therapy for Posttraumatic Stress Disorder

The goal of this clinical trial is to test if Written Exposure Therapy (WET) works well in a group setting in patients with post-traumatic stress disorder (PTSD).The main questions it aims to answer are:Does group WET lead to a reduction in symptoms of PTSD?Is group WET better at reducing the number of patients that drop out of treatment in comparison to group Cognitive Processing Therapy (CPT)?Participants will:Attend 6 weekly sessions of group WET that will be delivered online by two therapists (psychologist and social worker)Complete questionnaires relating to their symptoms at different points throughout the treatmentResearchers will evaluate change in PTSD symptoms over time for people who participate in group WET. They will also compare the results of group WET to the results of group CPT to see if group WET shows a similar reduction in symptoms of PTSD and fewer treatment drop-outs.

Inclusion Criteria:Between the ages of 18 and 65 years, inclusiveDiagnosis of PTSDAble to provide written informed consent and can read and write in EnglishExclusion Criteria:Diagnosis of an active severe substance use disorder (SUD)Diagnosis of a psychotic disorder (schizophrenia, schizoaffective disorder, etc.)Untreated active psychotic, manic or hypomanic symptomsHas attempted suicide in the 2 months prior to beginning treatmentHas engaged in high-risk self-harm (e.g., cutting, burning, asphyxiation) in the 2 months prior to beginning treatmentHas completed CPT in the pastHas completed another active PTSD treatment, such as Prolonged Exposure or EMDR within the last year