irtoys: dpv – R documentation

Become an expert in R — Interactive courses, Cheat Sheets, certificates and more!

dpv

Draw plausible values

Draws (by rejection sampling) plausible values from the posterior distribution of ability

dpv(resp, ip, 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.
`mu`	Mean of the apriori distribution. Default is 0.
`sigma`	Standard deviation of the apriori distribution. Ignored when `method="ML"`. Default is 1.
`n`	The number of plausible values to draw for each person (default is 5).

A matrix with n columns

Ivailo Partchev

plval <- dpv(resp=Scored, 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