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

resp

Item parameters: the object returned by \(est\), or its first part.

A measure of ability, typically produced with <code>mlebme</code>, 
<code>wle</code> etc. If missing, ML estimates will be computed automatically.

theta

Computes the api appropriateness index, a measure of person fit in IRT models

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.

api: The api appropriateness index

Description

Usage

Arguments

Value

References

Examples