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- Title
Rasch analysis of the Perceived Stress Scale: Transformation from an ordinal to a linear measure.
- Authors
Medvedev, Oleg N; Krägeloh, Christian U; Hill, Erin M; Billington, Rex; Siegert, Richard J; Webster, Craig S; Booth, Roger J; Henning, Marcus A
- 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.
- Subjects
NEW Zealand; COLLEGE students; RESEARCH evaluation; STATISTICS; PSYCHOLOGICAL stress; DATA analysis
- Publication
Journal of Health Psychology, 2019, Vol 24, Issue 8, p1070
- ISSN
1359-1053
- Publication type
Article
- DOI
10.1177/1359105316689603