testInfoOverTheta {conquestr} | R Documentation |
Calculates test information over a range of theta given a list of many sets of item parameters. Returns a data frame with item information at a discrete set of values of theta - useful for plotting item information functions.
testInfoOverTheta(myItems, minTheta = -6, maxTheta = 6, stepTheta = 0.1)
myItems |
a list of item parameters of the structure used in 'simplef' |
minTheta |
The smallest value of ability PDF to plot. |
maxTheta |
The largest value of ability PDF to plot. |
stepTheta |
The increment to iterate over the ability PDF. Defaults to 0.01. |
anItem<- matrix(c(0,0,0,1,1,0), nrow = 2, byrow = TRUE)
testInfoOverTheta(list(anItem))