Sentence examples for difference in the item from inspiring English sources
DIF should be considered an item bias compromising estimation of the person ability only if the difference in the item parameters can be explained by a meaningful, construct-irrelevant difference between subgroups.
For example, the three items with especially high relative difference in the item parameters (centered item difficultyAustria minus centered item difficultyGermany > 1.0) cover basic booking transactions, which prospective teachers at Austrian universities – unlike their counterparts in Germany – practice at several stages of their university education.
However, the PCA found that the 2 versions had similar structures, and a quasi-systematic difference in the item responses was observed, indicating that issues with the cross-cultural validity of the FGVS is unlikely to be the major cause of these differences.
M2 included the indicators for the test forms in the SEM model to examine the overall differences in the item difficulty levels across the four forms.
Three forced-choice items showed moderate effects (−0.56; 0.47; 0.56), indicating differences in the item functioning between female participants (N = 150) and male participants (N = 188) (Wilson 2005).
Using the R package TAM again facet models were calibrated, which yielded the differences in the item difficulties for each of the three groups.
The differences in the item order indicate that the German population found other items easier or more difficult to respond to than the American population.
This applies especially to Hospital 3. Scores between brackets in Table 8 indicate that there were large differences in the item scores between participants within the same discipline.
Outputs of the application of the HPO measurement tool are provided in Tables 6, 7 and 8. [Scores in brackets indicate that there were large differences in the item scores between participants within the discipline].
