Abstract The aim of this study was to investigate the characteristics of a psychological stress reaction scale for home caregivers, using Item Response Theory IRT. Participants consisted of 337 home caregivers who filled out aquestionnaire in order to measure several levels of psychological stress reaction. Grade response model was used to estimate the parameters, discrimination, and the level of difficulty regarding each item. We assessed the precision of measurement and the fit of the model, and found both precision and fit to be satisfactory. Keywords: home caregivers, Item Response Theory IRT, grade response model, psychological stress reaction, Item Response Category Characteristic Curve QOL Quality Of Life TEL : 0663282431 E-mail: kengot@osaka-ue.ac.jp 2F TEL : 0752557175
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Item Response Theory ; IRT IRT IRT a b c d IRT TOEFL Test of English as a Foreign Language Japanese Language Proficiency Test : JLPT IRT MULTILOG M-Plus R R IRT Itm Rizopoulos, 2006 Easy Estimation IRT
IRT Samejima, 1969 IRT Web Fastask SD12.06 WEB
Samejima, 1969 EasyEstGRM Ver.0.4.1 IBM SPSS Statistics Ver.20 Table 1
SD8.56 Table 1 No. N M SD IRT Table 2 a3.08 a3.02 a0.99a1.05 b 1 b 2 b 3 b 4 b 1 b 4 Figure 14 IRCCC
Table 2 No. a b1 b2 b3 b 1 b 2 b 3 b 4 Probability Figure 1 IRCCC Probability Figure 2 IRCCC
Probability Figure 3 IRCCC Probability Figure 4 IRCCC Figure 5
Test Infomation Test Infomation Standard Error Figure 5 Standard Error Total Score Figure 6
Figure 6 Table 3 Table 3
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Table 2 Web Human Service American Psychiatric Association 2013 Diagnostic and Statistical Manual of Mental Disorders,
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