An Open-Trial of Web-Prolonged Exposure (Web-PE) Among Active-Duty Military

Inclusion Criteria: * Active-duty military personnel and veterans who have deployed post 9/11 * Seeking treatment for PTSD * Significant PTSD symptoms as determined by a PCL-5 score greater than or equal to 31 * Has experienced a Criterion A event that is a specific combat-related event or high magnitude operational experience that occurred during a period of recent military deployment * Able to speak and read English and access to an internet-connected computer * Indication that the participant plans to be able to participant in the study for the next three months following the first assessment Exclusion Criteria: * Diagnosis of bipolar disorder or psychotic disorder, as determined by participant self-report) * Current substance dependence, as determined by participant self-report) * Diagnosis of a moderate or severe traumatic brain injury, as determined by participant self-report) * Current suicidal ideation severe enough to warrant immediate attention, as determined by participant self-report) * Currently engaged in evidence-based treatment for PTSD (e.g. Prolonged Exposure Therapy or Cognitive Processing Therapy), as determined by participant self-report.