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Table 2  H   i  coefficients for binary recoded GHQ items (1-2-3-4 to 0-0-1-1, i.e. traditional scoring method)

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

Wellbeing:

Label

H i

(item scalability)

Concentrate

0.57

Useful

0.51

Make decisions

0.62

Enjoy

0.52

Face problems

0.58

Reasonably happy

0.54

Distress:

 

Label

H i

 

(item scalability)

Lost sleep

0.58

Under Strain

0.67

Overcome

0.61

Unhappy

0.64

Losing confidence

0.64

Worthless

0.68