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difNLR - DIF and DDF Detection by Non-Linear Regression Models
Detection of differential item functioning (DIF) among dichotomously scored items and differential distractor functioning (DDF) among unscored items with non-linear regression procedures based on generalized logistic regression models (Hladka & Martinkova, 2020, <doi:10.32614/RJ-2020-014>).
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differential-item-functioningitem-analysispsychometricsstatistics
6.77 score 6 stars 1 dependents 55 scripts 437 downloadsdeltaPlotR - Identification of Dichotomous Differential Item Functioning (DIF) using Angoff's Delta Plot Method
The deltaPlotR package implements Angoff's Delta Plot method to detect dichotomous DIF. Several detection thresholds are included, either from multivariate normality assumption or by prior determination. Item purification is supported (Magis and Facon (2014) <doi:10.18637/jss.v059.c01>).
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4.56 score 7 dependents 12 scripts 1.5k downloads