calc_posterior_function: Calculate a posterior distribution of theta

In choi-phd/TestDesign: Optimal Test Design Approach to Fixed and Adaptive Test Construction

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).

choi-phd/TestDesign documentation built on Oct. 1, 2024, 2:37 a.m.