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Author or maintainer of the following packages:

catR

Provides routines for the generation of response patterns under unidimensional dichotomous and polyt...
difR

Provides a collection of standard methods to detect differential item functioning among dichotomousl...
irtProb

Multidimensional Person Item Response Theory probability distributions
nFactors

Indices, heuristics and strategies to help determine the number of factors/components to retain:

Impact Percentile

85

Number of Packages

4

Package Downloads

49,382

Citations

0