Pairwise Conditional Rasch Measurement Analysis and Diagnostics

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Documentation for package ‘rasch’ version 1.11.7

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

Help Pages

btl	Fit the Bradley-Terry-Luce model to paired comparisons
btl_dif	DIF analysis for paired comparisons
btl_dimensionality	Residual dimensionality of paired comparisons
btl_efrm	Fit the extended frame of reference model for paired comparisons
btl_equate	Equate two paired-comparison calibrations through their common objects
btl_information	Information and targeting of a paired-comparison design
btl_next_pairs	Recommend the next informative comparisons (adaptive step)
btl_transitivity	Transitivity of paired comparisons
chisq_detail	Class-interval detail for one item's chi-square test of fit
combine_items	Combine items into subtests and re-analyse
compare_fits	Compare fitted Rasch models
ctt_table	Traditional (classical test theory) statistics
dependence_magnitude	Estimate the magnitude of response dependence between two items
dif_anova	Differential item functioning by residual analysis of variance
dif_contrasts	Planned DIF contrasts derived from the factor structure
dif_size	DIF magnitude in logits with pairwise comparisons
dimensionality_magnitude	Magnitude of multidimensionality from a subtest analysis
dimensionality_test	Residual-component test of unidimensionality
distractor_analysis	Distractor analysis for multiple-choice items
distractor_rescore	Propose polytomous option scores from the distractor evidence
equate_tests	Equate two test calibrations through their common items
fit_summary_table	Test-of-fit summary as a table
guttman_table	Guttman-ordered response matrix and reproducibility
item_moments	Category-score moments for a polytomous item
judge_pair_surprise	Unexpected judgements of one judge, pair by pair
judge_surprise	Unexpected judgements of one judge
lr_test	Likelihood-ratio test of the partial credit against the rating scale model
pcml	Estimate Rasch thresholds by pairwise conditional maximum likelihood
pcml_pc	Estimate Rasch thresholds via the Andrich principal-components reparameterisation
person_extrapolated	Person measures with extrapolated extreme scores
person_wle	Warm's weighted likelihood estimates by raw score
plot_btl	Plot Bradley-Terry-Luce object locations
plot_btl_categories	Plot graded-comparison category curves
plot_btl_dependence	Plot a within-judge dependence effect
plot_btl_dim_map	Residual map of the leading paired-comparison bimension
plot_btl_equate	Plot a paired-comparison equating comparison
plot_btl_icc	Plot an object characteristic curve
plot_btl_judge_map	Unexpected-judgement map for one judge (pair level)
plot_btl_scree	Scree of paired-comparison residual bimensions
plot_btl_targeting	Targeting plot for a paired-comparison design
plot_btl_transitivity	Consistency plot for paired-comparison transitivity
plot_btl_units	Plot the frame units of a paired-comparison EFRM fit
plot_catfreq	Plot category frequencies
plot_ccc	Plot category probability curves
plot_distractors	Plot multiple-choice option curves
plot_equate	Plot a test-equating comparison
plot_facets	Plot facet severities
plot_frames	Plot frame units
plot_guttman	Plot the Guttman scalogram
plot_icc	Plot an item characteristic curve
plot_icc_frames	Plot an item's characteristic curves across frames
plot_item_map	Plot the item map (location against fit residual)
plot_kidmap	Plot a kidmap
plot_pca	Plot residual principal-component loadings
plot_pca_biplot	Biplot of the first two residual components
plot_pcc	Plot a person characteristic curve
plot_person_fit	Plot person fit
plot_pimap	Plot the person-item threshold distribution
plot_recovery	Recovery scatter of planted against recovered parameters
plot_resid_cor	Plot the residual-correlation heatmap
plot_resid_dist	Plot the fit residual distribution
plot_scree	Scree plot of the residual components with parallel analysis
plot_tcc	Plot the test characteristic curve
plot_threshold_map	Plot the threshold map
plot_threshold_prob	Plot threshold probability curves
plot_tif	Plot the test information function
plot_wright	Plot a Wright map
rack_data	Reshape repeated measurements for racked or stacked analysis
rasch	Fit and diagnose a Rasch model by pairwise conditional estimation
rasch_efrm	Fit the extended frame of reference model
rasch_mfrm	Fit a many-facet Rasch model
report_html	Write a self-contained HTML report of a Rasch analysis
residual_correlations	Residual correlations for local dependence (Yen's Q3)
residual_pca	Principal components of the residual correlations
resolve_dif	Resolve differential item functioning by iterative item splitting
run_app	Launch the rasch graphical interface
save_item_plots	Save a plot for every item
save_outputs	Save every output of a Rasch analysis to a folder
save_person_plots	Save a kidmap for every person
score_table	Raw score to measure conversion table
simulate_btl	Simulate paired-comparison (BTL) data with dial-in misfit
simulate_btl_efrm	Simulate paired-comparison EFRM data with differing frame units
simulate_efrm	Simulate extended frame-of-reference data with differing units
simulate_mfrm	Simulate many-facet (rated) data with dial-in misfit
simulate_rasch	Simulate person-by-item Rasch data with dial-in misfit
sim_recovery	Parameter recovery of a fit against the simulation truth
sim_replicate	Replicate a simulation for Monte Carlo studies
split_items	Split items by a person factor to resolve DIF
spread_test	Spread-parameter test for dependence within subtests
stack_data	Reshape repeated measurements for racked or stacked analysis
tailored_analysis	Tailored analysis for guessing
targeting_table	Targeting and reliability summary as a table
test_information	Test information function
threshold_index	Enumerate item-category thresholds