lord_wingersky

Compute the raw score distribution for a given theta value using the
Lord-Wingersky recursive formula, given item-level probabilities of a
correct response.

Provides functions for computing test reliability and conditional
standard error of measurement (CSEM) based on the methods described in
the Reliability in Educational Measurement chapter of the 5th edition of
"Educational Measurement" by Lee and Harris (2025, ISBN:9780197654965).

Huan Liu

emreliability

Test Reliability and CSEM in Educational Measurement

Won-Chan Lee

Min Liang

lord_wingersky function

<dl><dt>probs</dt>
<dd>A numeric vector (or matrix) of probabilities that a given
theta value will correctly answer each item. If a matrix is provided,
it will be coerced to a numeric vector.</dd></dl>

Arguments

Lord-Wingersky Recursive Formula — lord_wingersky

<dl>

<dt>probs</dt>
<dd>A numeric vector (or matrix) of probabilities that a given
theta value will correctly answer each item. If a matrix is provided,
it will be coerced to a numeric vector.</dd>

</dl>

lord_wingersky: Lord-Wingersky Recursive Formula

Description

Usage

Value

Arguments