scoreMetric {irtoys}

Sum score metric

Description

From a set of estimated item parameters, compute an item response function in sum score metric, i.e., the probabilities of a correct response predicted by the model at abilities corresponding to the possible (raw) sum scores.

Usage

scoreMetric(ip)

Arguments

ip

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

Value

An object with the same structure as the output of irf

Author(s)

Ivailo Partchev