estimate_helpers {xxIRT} | R Documentation |
Helper functions of Model Estimation
Description
miscellaneous helper functions for estimating IRT models
estimate_nr_iteration
updates the parameters using the newton-raphson method
Usage
estimate_nr_iteration(param, free, dv, h_max, lr, bound)
model_polytomous_3dindex(u)
model_polytomous_3dresponse(u)
Arguments
param |
the parameter being estimated |
free |
TRUE to freely estimate specific parameters |
dv |
the first and second derivatives |
h_max |
the maximum value of h |
lr |
the learning rate |
bound |
the lower and upper bounds of the parameter |
u |
the observed response, 2d matrix, values start from 0 |
[Package xxIRT version 2.1.2 Index]