sample.ipar {MAT}

Sample item parameters

Description

A sample item parameter file containing 180 Multidimensional 3-PL (M3PL) model.

Usage

data(sample.ipar)

Format

A data frame with item parameters for 180 items.

a1

the discrimination parameter for theta 1

a2

the discrimination parameter for theta 2

a3

the discrimination parameter for theta 3

d

the easiness parameter, d=-a*b

c

the guessing parameter

Details

First 60 items are primarily loaded on theta 1, second 60 on theta 2, and last 60 on theta 3.

Examples

  data(sample.ipar)