probab_GRM {cat.dt}

R Documentation

Item response GRM probabilities

Description

Computes the probabilities of picking every possible response of an specified item from the item bank for all evaluated ability levels using the Graded Response Model

Usage

probab_GRM(item_par, nres)

Arguments

item_par	vector containing the item parameters. First component is the alpha parameter and the next are the beta parameters
nres	number of possible item responses

Value

A matrix of response probabilities. Rows represent evaluated ability levels and columns represent responses

Author(s)

Javier Rodríguez-Cuadrado

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