Background/Objective: Stress is perceived differently across individuals, which might be particularly true for nonclinical and clinical subjects. For this reason, we tested a German adaption of the 10-item Perceived Stress Scale (PSS-10) for model fit and measurement invariance in a big nonclinical and clinical sample. Method: We (1) conducted multiple confirmatory factor analysis (CFA) in 1,248 nonclinical subjects and 575 outpatients, (2) measurement invariance with multigroup CFA, (3) assessed correlations with relevant constructs and (4) calculated internal consistencies for overall stress and the subscales Helplessness and Self-efficacy. Results: In both samples, CFA revealed a robust two-factorial structure with an excellent model fit. Group comparisons revealed strict measurement invariance. Correlations with associated measures support validity. Internal consistencies were good to very good. Conclusions: We show highly satisfactory psychometric properties of the German PSS-10 for nonclinical and clinical individuals. Measurement invariance analyses demonstrated that varying stress levels of people with a different mental health status are due to true interindividual differences.

背景/目标：个体对压力的感知不同，对于非临床和临床受试者尤其如此。因此，我们在大量非临床和临床样本中测试了德国版 10 项感知压力量表 (PSS-10) 的模型拟合和测量不变性。方法：我们 (1) 对 1,248 名非临床受试者和 575 名门诊患者进行多重验证性因素分析 (CFA)，(2) 多组 CFA 的测量不变性，(3) 评估与相关结构的相关性，(4) 计算总体压力和压力的内部一致性。分量表无助和自我效能。结果：在这两个样本中，CFA 揭示了具有出色模型拟合的稳健双因子结构。组比较揭示了严格的测量不变性。与相关措施的相关性支持有效性。内部一致性从好到非常好。结论：我们展示了德国 PSS-10 对非临床和临床个体非常令人满意的心理测量特性。测量不变性分析表明，具有不同心理健康状况的人的不同压力水平是由于真正的个体差异造成的。