deltaPlotR1.6 package

Identification of Dichotomous Differential Item Functioning (DIF) using Angoff's Delta Plot Method

adjustExtreme

Adjusting the proportions of correct responses for extreme cases

deltaPlot

Delta Plot method for dichotomous DIF

diagPlot

Plot of the Deltas points from the Delta Plot method

verbal.rd

Verbal Aggression Data Set

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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>).

  • Maintainer: David Magis
  • License: GPL (>= 2)
  • Last published: 2018-03-16