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Table 1 Fit to the Rasch model

From: Internal construct validity of the stress-energy questionnaire in a working population, a cohort study

  Item residual Person residual Chi square Unidemensionality
Analysis name Mean SD Mean SD Value p PSI Test % (95% CI)
1 Stress, 6 items 0.48 1.30 −049 1.19 52.79 0.52 0.92 10.5 (9.1;12.0)
2 Stress 2 testlets 0.31 0.56 −0.62 1.03 13.57 0.75 0.87 4.4 (3.0;5.9)
3 Energy, 6 items −0.008 2.05 −0.43 1.09 70.61 0.06 0.80 8.4 (7.0;9.9)
4 Energy, 4 items −0.31 2.35 −0.42 0.89 47.76 0.04 0.75 6.1 (4.6;7.5)
5 Energy re-scoring 0.03 2.07 −0.42 1.09 72.17 0.05 0.80 8.3 (6.9;9.8)
6 Energy DIFsplit −0.13 1.83 −0.42 1.08 74.73 0.15 0.80  
7 Energy 2 testlets 0.13 0.33 −0.49 0.83 23.20 0.18 0.70 3.3 (2.2;5.1)
Ideal values 0.0 <1.4 0.0 <1.4   >0.05 >0.7 (LCI <5%)
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