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  1. 1.
    DFIT::dichotomousItemParameters
    Sets of focal and reference item parameters from Wright (2011).
    csv| json| rda| rds
    list
  2. 2.
    DFIT::polytomousItemParameters
    Sets of focal and reference item parameters from Raju et al. (2009)
    csv| json| rda| rds
    list