irtoys: ability – R documentation

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ability

Estimate ability

A wrapper around all functions for ability estimation

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

`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).

Depends on the method.

Ivailo Partchev

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

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

v0.2.1

GPL (>= 2)

Authors

Ivailo Partchev [aut, cre], Gunter Maris [aut], Tamaki Hattori [ctb]

Initial release

2017-12-15