calc_info_matrix

Numeric. A vector of theta values.

item_parm

A numeric vector of the number of response categories by item.

ncat

A numeric vector indicating the IRT models of each item (1: 1PL, 2: 2PL, 3: 3PL, 4: PC, 5: GPC, 6: GR).

model

Calculate the Fisher information matrix for a vector of theta values and a set of items, potentially with a mixture of different models

Use the optimal test design approach by Birnbaum (1968, ISBN:9781593119348) and
van der Linden (2018) <doi:10.1201/9781315117430> in constructing fixed and adaptive tests. Supports the following
mixed-integer programming (MIP) solver packages: 'lpsymphony', 'Rsymphony', 'gurobi', 'lpSolve', and 'Rglpk'. The 'gurobi' package
is not available from CRAN; see <https://www.gurobi.com/downloads>. See vignette for installing 'Rsymphony' package
on Mac systems.

Seung W. Choi

TestDesign

Optimal Test Design Approach to Fixed and Adaptive Test
Construction

Sangdon Lim

calc_info_matrix function

Calculate the Fisher information matrix for a vector of theta values and a set of items, potentially with a mixture of different models — calc_info_matrix

calc_info_matrix: Calculate the Fisher information matrix for a vector of theta values and a set of items, potentially with a mixture of different models

Description

Usage

Arguments