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Table 1 Fit to the Rasch model

From: Internal construct validity of the Shirom-Melamed Burnout Questionnaire (SMBQ)

  Item Fit Residual Person Fit Residual Chi Square Interaction PSI Unidimensionality
Analysis Mean SD Mean SD Value df p   % Sig % at LCI
1, 22 items 0.741 4.005 -0.326 1.792 562.4 198 < 0.001 0.96669 10.10% 8.40%
2, 4 testlets -0.256 3.692 -0.463 1.075 56.77 36 0.01515 0.92432 3.20% 0.01%
3, 3 testlets -0.016 2.689 -0.444 0.962 32.28 27 0.22175 0.91544 3.25% 1.50%
4, Tension -0.315 1.978 -0.5 0.958 33.18 27 0.19132 0.86666 1.90% 0.01%