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Table 11 Backward stepwise removal of items violating IIO

From: Mokken scale analysis of mental health and well-being questionnaire item responses: a non-parametric IRT method in empirical research for applied health researchers

Label Step 1 Step 2 Step 3 Step 4 Step 5
Optimistic 2 2 1 0 0
Useful 3 2 1 1 0
Relaxed 2 2 1 0 0
Interested in others 8 NA NA NA NA
Spare energy 0 0 0 0 0
Deal with problems 2 1 1 1 0
Think clearly 1 0 0 0 0
Feel good 3 2 2 NA NA
Feel close 1 0 0 0 0
Confident 4 3 NA NA NA
Can decide 0 0 0 0 0
Feel loved 0 0 0 0 0
Interested 1 0 0 0 0
Cheerful 3 2 2 2 NA
  1. H T = 0.31.