Step Discriminations for the Two-Parameter Partial Credit Model on Top of 'TAM'

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Documentation for package ‘tppcm’ version 0.1.0

• DESCRIPTION file
• User guides, package vignettes and other documentation
• Package NEWS
• Package README

Help Pages

dif_test	Score (LM) tests of differential step and item functioning
dsf	Likelihood ratio tests of differential step functioning
dsf_design	Multigroup TPPCM design with group.equal and group.partial
get_parts	Components of a fitted model
irt_pars	Item and group parameters in a compact table
item_test	Item-level score tests
m2	Limited-information goodness of fit: M2, RMSEA2, SRMSR, CFI, TLI
mi	Modification indices for single step discriminations
score_test	Score test against a less restricted TPPCM
sim_tppcm	Simulate item responses from a TPPCM
step_info	Step, item and test information
tppcm	Step design for the TPPCM and its submodels
tppcmtree	TPPCM trees: model-based recursive partitioning of step discriminations
wald_test	Wald test of equal step discriminations within items
xxirt_tppcm	Fit TPPCM-family models with sirt::xxirt()
xxirt_vcov	Covariance matrix of an xxirt fit with shared or fixed parameters