Perceived stress reflects a person’s feeling of how much stress the individual is under at a given time. The Perceived Stress Scale (PSS) is a popular instrument measuring the extent to which individuals perceive situations in their life as excessive relative to the ability to cope. Based on a literature review, however, several issues related to the scale remain: (a) the dimensionality is not established, (b) little information about the individual items exists, and (c) much research is based on university student samples. To address these, this study evaluated the psychometric properties of the Korean version of the Perceived Stress Scale (KPSS) using a military sample. This study was conducted in South Korea with 373 military personnel, aged 19–30 years. Both classical test theory (CTT) and the Rasch rating scale model were used to examine the psychometric properties of the KPSS, including factor structure, concurrent validity, reliability, and item analyses. Internal consistency reliability for the overall and negative/positive perception subscales was.85, .85 and .86, respectively. Based on Rasch reliability, person and item reliability were .82 and .98, respectively. Person and item separation were 2.13 and 7.19, respectively. Concurrent validity was established, with significantly positive association with the measures of depression and negative association with the measure of life satisfaction. Findings from the CFA suggested that a bifactor model with two group factors was the best fit to the observed data. The RSM showed that all but one item had acceptable infit and outfit statistics, and item difficulty ranged from −.73 to 1.22. Besides, the RSM showed positive and moderate inter-item correlations ranging from .42 to .75. The results provided evidence that a 10-item Korean version of the Perceived Stress Scale was a reliable and valid scale to measure perceived stress in military samples.

中文翻译：

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军事样本中韩文版感知压力量表（PSS）的心理计量学特性

感知到的压力反映出一个人在给定时间承受的压力程度。感知压力量表（PSS）是一种流行的工具，用于衡量个人相对于应对能力的感知程度。但是，根据文献综述，仍然存在与规模有关的几个问题：（a）维度尚未建立；（b）关于单个项目的信息很少；（c）许多研究都是基于大学生样本。为了解决这些问题，本研究使用军事样本评估了韩版感知压力量表（KPSS）的心理测量特性。这项研究是在韩国对373名19至30岁的军人进行的。经典测试理论（CTT）和Rasch评分量表模型均用于检验KPSS的心理计量学特性，包括因素结构，并发有效性，可靠性和项目分析。整体和消极/正面知觉量表的内部一致性信度分别为.85，.85和.86。根据Rasch可靠性，人员和物品的可靠性分别为0.82和.98。人员和项目分离分别为2.13和7.19。建立了并发效度，与抑郁程度呈显着正相关，与生活满意度呈负相关。CFA的发现表明，具有两个小组因素的双因素模型最适合观察到的数据。RSM显示，除一件商品外，其他所有商品的穿着和穿着统计都可以接受，和物品难度范围从-.73到1.22。此外，RSM还显示出正的和中等的项间相关性，范围从0.42到0.75。结果提供了证据，朝鲜语的“感知压力量表”有10个项目，是衡量军事样本中感知压力的可靠且有效的量表。