Procedures
mood disorders, anxiety, insomnia, mental disorders, DSM-5
DISORDERS
After reading the participation information sheet and giving their consent, participants completed a brief initial online screening (SoSci Survey GmbH), which examined the exclusion criteria (a–d), using a dichotomous response format (criterion present yes or no). Suitable participants were then contacted for a diagnostic telephone interview. Clinical interviews were conducted by supervised psychology students shortly before their master’s degree and by a clinical psychologist. During the clinical interview, participants were evaluated for insomnia, anxiety disorders, and mood disorders utilizing the open access version of the structured clinical interview for diagnosing mental disorders (DIPS-OA) according to DSM-5, Axis I [Flow chart showing participant selection, dropout, flow, and attrition through the intervention (assessed via self-report).