probab_NRM {cat.dt} R Documentation

Item response NRM 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 Nominal Response Model

Usage

probab_NRM(item_par, nres)


Arguments

 item_par vector containing the item parameters. Odd components are the alpha parameters and even 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