att.plot {cdcatR}

Plots for attribute mastery estimates

Description

This function generates a plot monitoring the attribute mastery estimates (x-axis: Item position, y-axis: Mastery posterior probability estimate). If a parametric CD-CAT has been conducted, posterior probabilites (with confident intervals) of mastering each attribute are plotted. If a nonparametric CD-CAT has been conducted (and pseudo-probabilites have been computed), both nonparametric classification and pseudo-posterior probabilites (with confident intervals) of mastering each attribute are plotted. Pseudo-posterior probabilities is a method in progress. Caution in the interpretation is advised. Colors are used in the plots to indicate mastery (green), non-mastery (red), or uncertainty (blue).

Usage

att.plot(cdcat.obj, i, k = NULL)

Arguments

cdcat.obj

An object of class cdcat

i

Scalar numeric. It specifies the examinee to be plotted

k

Numeric vector. It specifies the attribute/s to be plotted. Default is NULL, which plots all attributes

Value

att.plot returns a plot of class ggplot.