easyRaschBayes 0.2.0.1 (dev)

easyRaschBayes 0.2.0

Updates:
- infit_statistic() is now faster and defaults to not output outfit statistics, since these are of dubious value (see Müller 2020 and Johansson, 2025).
- item_restscore_statistic() is now faster and has output similar to infit_post().
- q3_statistic() is now faster and has output similar to infit_post().
- plot_residual_pca() is now faster.
Three post-processing helper functions that output a list with result table(s) and a plot:
- infit_post() for the output of infit_statistic()
- item_restscore_post() for the output of item_restscore_statistic()
- q3_post() for the output of q3_statistic()
Other new functions:
- plot_icc() can both produce a basic conditional Item Characteristic Curves plot and optionally a DIF ICC plot, the latter also reporting a partial gamma DIF magnitude coefficient. This is inspired by iarm::ICCplot()
- item_parameters() to retrieve item threshold locations
- person_parameters() to retrieve person locations (latent scores) using EAP and WLE, and also a transformation table from ordinal sum score to EAP/WLE.
- posterior_to_prior() that extracts priors from a brmsfit model that may be useful in model fit assessment. An article will be added later, exploring this further.
- plot_tile(), plot_bars(), and plot_stackedbars() uses wide format item data to create plots to review response patterns.