grm_prob: Probability function for GRM

In exametrika: Test Theory Analysis and Biclustering

Probability function for GRM

Description

Calculates the probability of selecting each category given a latent trait value and item parameters.

Usage

grm_prob(theta, a, b)

Arguments

theta	Latent trait value of the subject
a	Discrimination parameter of IRF
b	Vector of difficulty parameters (thresholds) of IRF

Value

Vector of category selection probabilities

Examples

## Not run: 
# Example for an item with 3 categories
a <- 1.5
b <- c(-1.0, 1.0)
theta <- 0
grm_prob(theta, a, b)

## End(Not run)

exametrika documentation built on Aug. 21, 2025, 5:27 p.m.