The MET intervention will consist of three 45-90 minute telephone delivered sessions that will be staggered to occur 1 week, 1 month, and 2 months after the baseline assessment.

The treatment as usual (TAU) condition was selected to mirror the existing process in the military for identifying and encouraging treatment for personnel who screen positive for PTSD.

The MET intervention will consist of three 45-90 minute telephone delivered sessions that will be staggered to occur 1 week, 1 month, and 2 months after the baseline assessment. The first MET session intervention will involve a counselor using motivational interviewing (MI) strategies to establish an empathic therapeutic relationship and focus learning about the PTSD symptoms the participant is experiencing and exploring ambivalence about seeking treatment services. MET sessions 2 and 3 will focus on identifying and responding to risk factors for dropping out of treatment (increases in ambivalence, avoidance behavior, concerns about stigma, life chaos), identifying and responding to barriers to participant's active engagement in treatment, and facilitating enrollment in alternate therapeutic resources if necessary.

The Clinician Administered PTSD Scale (CAPS) is a structured, clinician-administered interview that assesses the severity of each of the PTSD symptoms listed in Diagnostic and Statistical Manual of Mental Disorders (DSM-5) and yields a clinical PTSD diagnosis and overall severity rating. The CAPS total severity rating ranges from 0-80, with higher scores indicating greater PTSD severity.

The Treatment Utilization questionnaire asks about current and past use of different treatment services.

Part 1: Participants are asked (yes/no) if they have ever participated in treatment or support for different concerns (i.e., depression, marital or family concerns, posttraumatic stress, smoking cessation, anger management, and drinking or drug use) and then asked to identify type of treatment or support (i.e., self help, group therapy, individual therapy, medication, inpatient/ residential program, and other) they received for any of the concerns they reported "yes".

Part 2: Participants are asked (yes/no/not applicable) if they have participated in treatment or support for any of the concerns reported in Part 1 in the past 3 months.

Part 3: Participants are asked (yes/no) about their use of treatment and support resources used in the past 3 months for dealing with psychological or emotional concerns related to a traumatic event.

The Treatment Reactions Scale (TRS) is a 31-item measure that assesses the respondent's perceptions of treatment for mental and behavioral health. The TRS total score ranges from 31-155, with lower scores indicating more favorable reactions to treatment.

The TRS consists of 5 subscales:

Embarrassment/shame for seeking treatment (5 items, range 5-25; lower score indicates less embarrassment/shame for seeking treatment) Occupational/career impact of seeking treatment (4 items, range 4-20; lower score indicates less occupational/career impact of seeking treatment) Perceived debasement for receiving treatment (9 items, range 9-45; lower score indicates less perceived debasement for receiving treatment) Willingness to recommend treatment (7 items, range 7-35; lower score indicates more willingness to recommend treatment) Confidence in/belief in the efficacy of treatment (6 items, range 6-30; lower score indicates more confidence in/belief in the efficacy of treatment)

Measure that asks respondents to rate frequency of nine depressive symptoms over the past two weeks.