Participants will receive a course of individual therapy through the Operational Stress Injury Clinic (OSIC) at Deer Lodge Centre. Therapy will consist of a validated treatment protocol known as Positive Valence System Enhancement Treatment for Anxiety and Depression (PVSET), which will consist of psychoeducation and positive activity interventions designed to increase positive emotions, cognitions, and behaviors. Therapy sessions will be facilitated by psychologists, licensed therapists (e.g., MSW, RPN), and/or graduate students in psychology under supervision at the OSIC. PVSET will consist of 6 sessions, each lasting one hour, and will be delivered either virtually or in-person at OSIC depending on patient preference.

6, one-hour sessions of individual therapy, consisting of Positive Valence System Enhancement Treatment for Anxiety and Depression (PVSET), which will consist of psychoeducation and positive activity interventions designed to increase positive emotions, cognitions, and behaviors.

Change in depression symptoms based on the Patient Health Questionnaire-9 (PHQ-9). Scores on this scale range from 0-27, with higher scores indication more severe depression.

Change in anxiety symptoms based on the Overall Anxiety Severity and Impairment Scale (OASIS). Scores on this scale range from 0-20, with higher scores indication more severe anxiety.

Change in PTSD symptom severity based on the Posttraumatic Stress Disorder Checklist for DSM-5 (PCL-5). Scores on this scale range from 0-80 with higher scores indicating greater symptom severity.

Change in positive and negative affect based on the Positive and Negative Affect Schedule (PANAS). Scores on the two subscales of this assessment range from 0-50, with higher scores on the positive affect subscale representing higher levels of positive affect, and lower scores on the negative affect subscale representing lower levels of negative affect.