Intersectional Differential Item Functioning Analysis
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Documentation for package ‘iDIFr’ version 1.0.1
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 |