학술논문
Rasch analysis of the Perceived Stress Scale: Transformation from an ordinal to a linear measure.
Document Type
Article
Author
Source
Subject
*COLLEGE students
*STATISTICS
*PSYCHOLOGICAL stress
*DATA analysis
RESEARCH evaluation
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Language
ISSN
1359-1053
Abstract
Rasch analysis was conducted to enhance the precision of the widely used 10-item Perceived Stress Scale using two datasets (n = 450 each) randomly selected from samples of the New Zealand general population (n = 1102), New Zealand university students (n = 479) and US university students (n = 396). The best Rasch model fit (χ 2(27) = 29.92, p =.36), good person separation reliability (.80) and coverage (98%) of the sample by the scale items were achieved when locally dependent items were combined into subtests. These findings support reliability and internal structural validity of the 10-item Perceived Stress Scale. The instrument precision can be further improved using the ordinal-to-linear conversion tables published here. [ABSTRACT FROM AUTHOR]