calc_posterior_function {TestDesign} | R Documentation |
Calculate a posterior distribution of theta
Description
Calculate a posterior distribution of theta.
Usage
calc_posterior_function(
theta_grid,
item_parm,
resp,
ncat,
model,
prior,
prior_parm
)
Arguments
theta_grid |
An equi-spaced grid of theta values. |
item_parm |
A numeric matrix of item parameters. |
resp |
a numeric vector containing item responses. |
ncat |
A numeric vector of the number of response categories by item. |
model |
A numeric vector indicating the IRT models of each item (1: 1PL, 2: 2PL, 3: 3PL, 4: PC, 5: GPC, 6: GR). |
prior |
The type of prior distribution (1: normal, 2: uniform). |
prior_parm |
A numeric vector of hyperparameters for the prior distribution, c(mu, sigma) or c(ll, ul). |
[Package TestDesign version 1.6.1 Index]