dpv: Draw plausible values

In lebebr01/irtoys-2: Simple interface to the estimation and plotting of IRT models

Description

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

Usage

  dpv(resp, ip, 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: a matrix with one row per item, and three columns: [,1] item discrimination a, [,2] item difficulty b, and [,3] asymptote c.
mu	Mean of the apriori distribution. Ignored when method="ML". 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).

Value

A matrix with n columns

Author(s)

Ivailo Partchev

See Also

mlebme, eap

Examples

plval <- dpv(resp=Scored, ip=Scored2pl$est)

lebebr01/irtoys-2 documentation built on May 20, 2019, 11:29 p.m.