R: Intersectional Differential Item Functioning Analysis

# Intersectional Differential Item Functioning Analysis

## Documentation for package ‘iDIFr’ version 1.0.1

- DESCRIPTION file.
- User guides, package vignettes and other documentation.
- Package NEWS.

## 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