tsc: True scores with standard errors

Description Usage Arguments Value Author(s) See Also Examples

View source: R/tracelines.R

Description

Computes the IRT true scores (test response function at the estimated ability) and an estimate of their standard error via the delta theorem, treating item parameters as known).

Usage

1
tsc(ip, theta)

Arguments

ip

Item parameters: the output of est, or a 3-column matrix corresponding to its first element, est.

theta

An object containing ability estimates, as output by function mlebme or eap

Value

A matrix with the true scores in column 1, and their standard errors of measurement (SEM) in column 2

Author(s)

Ivailo Partchev

See Also

mlebme, eap, trf

Examples

1
2
th <- mlebme(resp=Scored, ip=Scored2pl)
tsc(Scored2pl, th)

irtoys documentation built on May 2, 2019, 3:03 a.m.