A 53-item self-report scale, to evaluate psychological distress and symptoms of psychiatric disorders. This scale has good internal consistency reliability and strong convergent validity [27]. Participants are asked to rate on a 5-point Likert scale whether and how much they were distressed by the different symptoms over the last week. In this study, we focused on the global severity index (GSI; Cronbach’s α in the present study was = .97). In Study 1, 22 participants (5%), skipped one item, one participant skipped two items and one participant skipped eight items. As the GSI is calculated by dividing the total number of items to which the individual responded, missing items were not replaced. In Study 2, we used the shorter 18-items version of Brief Symptom Inventory. Nine participants (1%) skipped one item in the Brief Symptom Inventory (BSI-18; [28]) (Cronbach’s α in Study 2 = .94).

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