Package index

Item Fit

infit_statistic()

Posterior Predictive Infit Statistic for Bayesian IRT Models

infit_post()

Summarize and Plot Posterior Predictive Infit Statistics

item_restscore_statistic()

Posterior Predictive Item-Restscore Association for Bayesian IRT Models

item_restscore_post()

Summarize and Plot Posterior Predictive Item-Restscore Associations

plot_icc()

Item Characteristic Curves with Class Intervals

fit_statistic_pcm()

Posterior Predictive Item Fit Statistic for Bayesian IRT Models

fit_statistic_rm()

Posterior Predictive Item Fit Statistic for Binary Bayesian IRT Models

Local Dependence

q3_statistic()

Posterior Predictive Q3 Residual Correlations for Bayesian IRT Models

q3_post()

Summarize and Plot Posterior Predictive Q3 Residual Correlations

Dimensionality

plot_residual_pca()

Residual PCA Contrast Plot for Bayesian IRT Models

Differential Item Functioning

dif_statistic()

Differential Item Functioning (DIF) Analysis for Bayesian IRT Models

plot_icc()

Item Characteristic Curves with Class Intervals

Plots

plot_targeting()

Person-Item Map (Targeting Plot) for Bayesian IRT Models

plot_ipf()

Item Category Probability Function Curves for Polytomous IRT Models

plot_icc()

Item Characteristic Curves with Class Intervals

plot_tile()

Tile Plot of Item Response Distributions

plot_bars()

Item Response Distribution Bar Chart

plot_stackedbars()

Stacked Bar Chart of Item Response Distributions

plot_residual_pca()

Residual PCA Contrast Plot for Bayesian IRT Models

Reliability

RMUreliability()

Estimate reliability (Relative Measurement Uncertainty) from Bayesian measurement models

Other

item_parameters()

Extract Item Parameters from a Bayesian Rasch Model

person_parameters()

Extract Person Parameters from a Bayesian Rasch Model

posterior_to_prior()

Extract Informative Priors from a Fitted Bayesian IRT Model