Intersectional Differential Item Functioning Analysis

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Documentation for package ‘iDIFr’ version 1.0.1

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

Help Pages

check_groups	Check group structure and cell sizes before running DIF analysis
cross_details	Full crossing breakdown for a demographic variable
export_results	Export iDIFr results to Excel
fit_2pl	Fit a 2PL IRT model via marginal maximum likelihood (EM)
group_details	Full per-group cell size breakdown
idifr	Run intersectional DIF analysis
item_loglik	Compute per-item log-likelihood contributions from a fitted irt_2pl model
item_loglik_mg	Per-item LL for a multigroup constrained model
merge_groups	Merge sparse groups
plot.idifr	Plot method for idifr objects
print.idifr	Print method for idifr objects
simulate_dif	Generate synthetic DIF data for testing and simulation
summary.idifr	Summary method for idifr objects
tidy	Tidy an idifr object
tidy.idifr	Return tidy data frame of DIF results