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This difference in item content clearly reflects the scales' different provenance: that of the FIS-8 arises from its testing in children with severe caries, whereas the epidemiological origins of the ECOHIS-Family mean that the more severe effects on families were not sufficiently prevalent to make an impact.
These results suggest some more fine-grained pattern of difference in item difficulty across the two SBA task types, which was not reported in previous studies.
More importantly, we wanted to use values that can be found in examining difference in item parameters in large-scale assessments.
The highest power rates were noted in conditions where the difference in item parameters for both the discrimination and difficulty were large.
fMagis and De Boeck ([in press]) recently found inflated Type I error rates in Mantel-Haenszel approach, and similarly attribute the inflation to the item impact and difference in item discriminations.
The main disparity is the difference in item difficulty (location).
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No significant difference in item-specific memory was found between the three groups.
There was no statistically significant gender or ethnic difference in items regarding students participation in the program ["Participation should be obligatory": males: 4.54 ± 1.99, females: 4.83 ± 1.99, p = 0.49; Arabs and Druze 4.09 ± 2.37, Jewish 4.79 ± 1.87, p = 0.213.
Future studies with larger sample of patients could lead to a better understanding of differences in item functioning across different South American countries and cultures and move forward to item banking and CAT technology suitable for developing countries.
Differences in item difficulty between items in different multiple choice option formats: Facility indices compared using ANOVA.
We conducted a secondary analysis of FSS data from three different studies of samples with potential diagnostic differences in item hierarchy.
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