ability: Estimate ability

In irtoys: A Collection of Functions Related to Item Response Theory (IRT)

Estimate ability

Description

A wrapper around all functions for ability estimation

Usage

ability(resp, ip, method = "WLE", mu = 0, sigma = 1, n = 5)

Arguments

resp	A matrix of responses: persons as rows, items as columns, entries are either 0 or 1, no missing data
ip	Item parameters: the object returned by est.
method	One of: "MLE", "BME", "WLE", "EAP", "PV", "QRS", "SUM"
mu	Mean of the apriori distribution when applicable
sigma	Standard deviation of the apriori distribution when applicable method="ML". Default is 1.
n	The number of plausible values to draw for each person (default is 5).

Value

Depends on the method.

Author(s)

Ivailo Partchev

See Also

mlebme, eap, wle, dpv, qrs

Examples

theta <- ability(resp=Scored, method="WLE", ip=Scored2pl)

irtoys documentation built on May 12, 2022, 5:06 p.m.