interactionModel

A matrix of responses: persons as rows, items as columns,
entries are either 0 or 1, no missing data

Convergence criterion, default is 1e-1

if TRUE, the Rasch model will be estimated instead.

rasch

Estimates the parameters of the interaction model. The plots can be produced with the
appropriate plotting method.

models

A collection of functions useful in learning and practicing IRT,
which can be combined into larger programs. Provides basic CTT analysis,
a simple common interface to the estimation of item
parameters in IRT models for binary responses with three different programs
(ICL, BILOG-MG, and ltm), ability estimation (MLE, BME, EAP, WLE, plausible
values), item and person fit statistics, scaling methods (MM, MS, Stocking-Lord,
and the complete Hebaera method), and a rich array of parametric and
non-parametric (kernel) plots. Estimates and plots Haberman's interaction model
when all items are dichotomously scored.

interactionModel: Interaction model

Description

Usage

Arguments

Value

References