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repsd: Root Expected Proportion Squared Difference for Detecting DIF
Root Expected Proportion Squared Difference (REPSD) is a nonparametric
differential item functioning (DIF) method that (a) allows practitioners
to explore for DIF related to small, fine-grained focal groups of examinees,
and (b) compares the focal group directly to the composite group that will be
used to develop the reported test score scale. Using your provided response
matrix with a column that identifies focal group membership, this package
provides the REPSD values, a simulated null distribution of possible REPSD
values, and the simulated p-values identifying items possibly displaying DIF
without requiring enormous sample sizes.
Documentation:
Downloads:
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These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.
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