dicrfBn {lazy.irt}R Documentation

Calculation of the Derivative of Item Response Function of Binary Normal CDF Items

Description

Calculation of the Derivative of Item Response Function of Binary Normal CDF Items

Usage

dicrfBn(param, theta, maxZ = 700, zero = 0, smallP = 0, print = 0,
  plot = 0)

Arguments

param

Item Parameter Data Frame

theta

Discrete theta values

maxZ

Maximum value of the argument to logistic function

zero

= 0 to exclude the xzero-th category from output

smallP

Minimum value of probability

print

= 1 to print result

plot

= 1 to plot result

Value

dP length(theta) x nitems dICRF matrix when zero=0
length(theta) x 2*nitems dICRF matrix when zero=1


[Package lazy.irt version 0.1.3 Index]