Possible underlying causes of item bias were examined
using a simulation procedure. Data sets were
generated to conform to specified factor structures and
mean factor scores. Comparisons between the item parameters
of various data sets were made with one data
set representing the "majority" group and another
data set representing the "minority" group. Results
indicated that items that required a secondary ability,
on which two groups differed in mean level, were
generally more biased than those items that do not require
a secondary ability. Items with different factor
structures in two groups were not consistently identified
as more biased than those having similar factor
structures. A substantial amount of agreement was
found among the bias indices used in the study.
McCauley, Cynthia D & Mendoza, Jorge. (1985). A simulation study of item bias using a two-parameter item response model. Applied Psychological Measurement, 9, 389-400. doi:10.1177/014662168500900408
McCauley, Cynthia D.; Mendoza, Jorge.
A simulation study of item bias using a two-parameter item response model.
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