In this study, a stress reaction scale was constructed based on an Item Response Model, and the developmental process of psychological stress reactions was investigated by using test characteristic curves. Subjects consisted of 286 private college students and 234 national college students. The Job Stress Scale (JSS) was revised for college students, and used to assess psychological stress reaction. Graded response model of Item Response Theory (IRT) was used to estimate parameters. After estimating item and subject parameters, we assessed the precision of measurement and the fit of the model, and found both precision and fit to be satisfactory. Then we examined the test characteristic curves of each subscale to investigate the developmental process of psychological stress reactions of college students in comparison with company employees.
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