| dicrfB {lazy.irtx} | R Documentation |
Calculation of the Derivative of Item Response Function of Binary Logistic Items
dicrfB(param, theta, maxZ = 700, zero = 0, smallP = 0, print = 0, plot = 0)
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 |
dP length(theta) x nitems dICRF matrix when zero=0
length(theta) x 2*nitems dICRF matrix when zero=1