dpv {irtoys}

Draw plausible values

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: 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).

Value

A matrix with n columns

Author(s)

Ivailo Partchev

See Also

mlebme, eap

Examples

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