Positive Processes and Transition to Health - Single-Session (PATH-SS)

The PSS-I is a 24-item, state-of-the-art, psychometrically-validated interview used to assess DSM-5 criteria for PTSD and symptom severity. The PSS-I-5 includes 20 questions assessing symptom severity on a 5-point Likert scale (0 = not at all, 4 = six or more times a week/severe), and scores are calculated by summing responses, with higher scores indicating higher PTSD severity, as well as two questions assessing distress and interference and two questions assessing symptom onset and duration.

The QIDS-C is a 16 item, state-of-the-art, psychometrically-validated interview used to assess depression. Items are rated on a 4-point scale with anchors that vary with the question (e.g., 0 = I do not feel sad, 3 = I feel sad nearly all of the time).

The PDS-5 is a 24-item self-report measure used to assess prior trauma exposure and subsequent PTSD symptoms in the past month. The PDS-5 uses a trauma screen to identify prior exposure to traumatic events and assesses the severity of DSM-5 PTSD symptoms related to the event causing the most distress. The PDS-5 includes 20 questions assessing symptom severity on a 5-point Likert scale (0 = not at all, 4 = six or more times a week/severe), and scores are calculated by summing responses, with higher scores indicating higher PTSD severity. The PDS-5 also includes two questions assessing distress and interference and two questions assessing symptom onset and duration.

The QIDS-SR is a 16-item self-report measure that assesses depression. Items are rated on a 4-point scale with anchors that vary with the question (e.g., 0 = I do not feel sad, 3 = I feel sad nearly all of the time).

The SHAPS is a 14-item self-report measuring the capacity to experience pleasure. On a four-point scale (1 = Strongly Agree to 4 = Strongly Disagree), varying statements are rated (e.g., "I would find pleasure in small things"; "I would find pleasure in a telephone call from a friend"). The measure has good convergent and discriminant validity and reflects a unidimensional construct of anhedonia (Leventhal et al., 2006; Nakonezny et al., 2010).

The MSPSS is a 12-item self-report measure that assesses an individual's perceived level of social support from family, friends, and significant others. Items are rated on 7-point Likert scale (1 = Very Strongly Disagree, 7 = Very Strongly Agree).

The WAI-SR is a refined measure of the therapeutic alliance that assesses three key aspects of the therapeutic alliance: (a) agreement on the tasks of therapy, (b) agreement on the goals of therapy and (c) development of an affective bond. The WAI-SR demonstrated good psychometric properties in an initial validation in psychotherapy outpatients in the USA (Munder et al., 2010), as well as in subsequent studies with college students (e.g., Jeong et al., 2023).

Includes three questions measuring participants' experiences of relative distress and cost-benefit beliefs about the survey content: "Was completing study tasks related to the topic of unwanted sexual encounters more or less distressing than anticipated?"; "How important do you believe it is for psychologists to ask about unwanted sexual encounters in order to study the impact of them?"; and "Please consider both your experience completing study tasks related to the topic of unwanted sexual encounters, and your feelings about how important it is that we ask these questions. How good of an idea is it to include such tasks in psychology research?". Items are rated on a 5-point scale with anchors that vary with the question (e.g., 1 = much more distressing, 2 = somewhat more, 3= neutral, 4= somewhat less, and 5 = much less distressing).

The CSQ-8 is an 8-item questionnaire used to assess satisfaction in mental health services (Sitzia, 1999). This tool includes a brief standardized scale with good psychometric properties that provides an overall assessment of satisfaction (Rush et al. 2008). An additional item was added to specifically assess single-session format of treatment.

The CS is a 6-item self-report questionnaire that was developed for the purpose of the present study to assess patients' perceptions of the credibility of the treatment they were being provided. Participants responded to each item by rat- ing the extent to which the treatment makes sense and is logical to them on a 5-point Likert-type scale ranging from 1 to 5. The six treatment credibility items are: (a) How credible do you think this therapy is? ("not at all credible" to "very credible"); (b) How logical does this therapy seem to you? ("not at all logical" to "very logical"); (c) How much do you trust this therapy to help you? ("not at all" to "very much"); (d) How credible does your therapist seem? ("not at all credible" to "very credible"); (e) How much do you trust your therapist to be able to help you? ("not at all" to "very much"); and (f) How knowledgeable does your therapist appear? ("not at all knowledgeable" to "very knowledgeable").

This measure consists of 8 items assessing adherence to and utility of skills/techniques taught in therapy. Items are rated on a 5-point Likert scale with anchors that vary with the question (e.g., 0 = Not at all, 4 = More than 10 times; 0 = Not at all helpful, 4 = Extremely helpful).

The demographics questionnaire asks participants to provide information related to their age, sex and gender identity, sexual orientation, ethnicity, relationship status, and college year, (if applicable).

This 4-item measure asks about current and past engagement in mental health services, respectively.

The MINI is a brief, structured diagnostic interview used to screen for the major psychiatric disorders according to current diagnostic standards (e.g., the Diagnostic and Statistical Manual of Mental Disorders, 5th edition [DSM-5]). Validation and reliability studies have been done comparing the MINI to the structured interviews developed by the American Psychiatric Assocaition and the World Health Organization (e.g., Amorim, 2000; Shields et al., 2021). The results of these studies show that the MINI has similarly high reliability and validity properties to both these instruments, but can be administered in a much shorter period of time (median administration time = 15 minutes).

The C-SSRS will be administered by members of the study team (under the supervision of a licensed therapist) used to assess inclusion/exclusion criteria and monitor suicidality.