begavett/lordplot: Plot that Relates Test Scores to the Traits Underlying the Test

Replicates plots produced by Lord in his 1953 article, "The relation of test score to the trait underlying the test." This function takes item response theory parameters (currently 2- and 3-parameter logistic) as the primary inputs and uses them to create plots relating a theoretical normal distribution (representing the latent trait and plotted on the x-axis) to the "true score" distribution (representing a large number of possible observed test results and plotted on the y-axis).

install.packages("remotes")
remotes::install_github("begavett/lordplot")