A package used to convert the theta scale of an IRT model (fitted using the mirt package) into a bit scale. Bit scores can be computed directly from estimated thetas.
The package can be installed directly from github using the devtools package as follows:
devtools::install_github("joakimwallmark/bitscale")If you don't have devtools installed yet, you can install it via:
install.packages("devtools")After installing, refer to the package help files for more information on how to use the package:
library(bitscale)
?bit_scores
?bit_plot_item
help(package = "bitscale")