dicrfPN {lazy.irt}R Documentation

Calculation of the Derivative of Item Response Function of Partial Credit Items in Nominal Format

Description

Calculation of the Derivative of Item Response Function of Partial Credit Items in Nominal Format

Usage

dicrfPN(paramPN, theta, smallP = 0, print = 0, plot = 0, debug = 0)

Arguments

paramPN

Item Parameter Data Frame for Partial Credit Model in Nominal Format

theta

Discrete theta values

smallP

Minimum value of probability

print

= 1 to print result

plot

= 1 to plot result

debug

= 1 to print intemediate result

Value

A list of
dP length(theta) x sum(ncat) dICRF matrix
dPt length(theta) x nitems derivative of item response function
fromP, toP indexes of each ICRF in P
fromPP, toPP indexes of each ICBRF in PP


[Package lazy.irt version 0.1.3 Index]