posterior: Calculate posterior for one item given score, difficulty and...

In dscore: D-Score for Child Development

Calculate posterior for one item given score, difficulty and prior

Description

Calculate posterior for one item given score, difficulty and prior

Usage

posterior(score, tau, prior, qp, scale)

Arguments

score	Integer, either 0 (fail) and 1 (pass)
tau	Numeric, difficulty parameter
prior	Vector of prior values on quadrature points qp
qp	vector of equally spaced quadrature points
scale	expansion relative to the logit scale

Details

This function assumes that the difficulties have been estimated by a binary Rasch model, e.g. by rasch.pairwise.itemcluster() of the sirt package.

Value

A vector of length length(prior)

Note

: Internal function

Author(s)

Stef van Buuren, Arjan Huizing, 2020

See Also

dscore()

dscore documentation built on June 22, 2024, 9:21 a.m.