Research Article
The Effect of Small Sample Size on Measurement Equivalence of Psychometric Questionnaires in MIMIC Model: A Simulation Study
Table 6
Detection of uniform-DIF for GHQ-12 with MIMIC model.
| | GHQ-12 items | M100/F100 | M100/F200 | M100/F300 | M100/F400 | M100/F500 |
| | Item 1 | Able to concentrate | − | − | − | + | + | | Item 2 | Lost much sleep | − | − | − | − | − | | Item 3 | Playing a useful part | − | − | − | − | − | | Item 4 | Capable of making decisions | − | − | − | − | − | | Item 5 | Under stress | − | − | − | − | − | | Item 6 | Could not overcome difficulties | − | − | − | − | − | | Item 7 | Enjoy your day-to-day activities | − | − | − | − | − | | Item 8 | Face up to problems | − | − | − | − | − | | Item 9 | Feeling unhappy and depressed | − | − | − | − | − | | Item 10 | Losing confidence | − | − | − | − | − | | Item 11 | Thinking of self as worthless | − | − | − | − | − | | Item 12 | Feeling reasonably happy | + | + | + | + | + |
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The plus sign indicates item with DIF and the minus sign indicates item with free-DIF; the letter “M” means male and the letter “F” means female.
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