PDIF: The PDIF effect size from the difMH

In cswells1/MeasInv: Collection of Methods to Detect Dichotomous and Polytomous Differential Item Functioning (DIF)

Description

The PDIF effect size from the difMH

Usage

PDIF(data, group, focal.name, difMH.output, sig.level)

Arguments

data	numeric: either the data matrix only, or the data matrix plus the vector of group membership.
group	factor: the vector of group membership
focal.name	numeric or character: a single value
difMH.output	character: either the file path or file name to save the output
sig.level	numeric: the significance level

Value

The data frame of the output has a number of rows equal to the number of items. The columns include Prop_Focal (proportion correct for the focal group), Prop_Ref* (predicted proportion correct in the reference group), PDIF, SE(PDIF) (standard error of the PDIF), Lower_Limit (lower limit of the confidence interval for the parameter), and Upper_Limit (upper limit of the confidence interval for the parameter).

cswells1/MeasInv documentation built on Dec. 19, 2021, 7 p.m.