Obtains the ETS Delta measure for Mantel-Haneszel DIF statistic effect size.

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Description

Obtains the ETS Delta measure for Mantel-Haneszel DIF statistic effect size.

Usage

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DeltaMhIrt(mh, logistic = FALSE)

Arguments

mh

A numeric vector containing the MH statistic values

logistic

A logical indicating whether the logistic or the normal metric should be used.

Value

delta A numeric vector containing the delta values

Author(s)

Victor H. Cervantes <vcervantes at icfes.gov.co> <vhcervantesb at unal.edu.co>

References

Holland, P.W., and Thayer, D.T. (1988). Differential Item Performance and the Mantel-Haenszel Procedure. In H. Wainer and H.I. Braun (Eds.), Test Validity. Hillsdale, NJ: Erlbaum.

Examples

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data(dichotomousItemParameters)
threePlMh <- IrtMh(itemParameters = dichotomousItemParameters,  irtModel = "3pl",
                   focalDistribution = "norm",
                   referenceDistribution = "norm", focalDistrExtra = list(mean = 0, sd = 1),
                   referenceDistrExtra = list(mean = 0, sd = 1), groupRatio = 1,
                   logistic = FALSE)
delta3pl <- DeltaMhIrt(threePlMh)

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