kr21

Compute the KR-21 reliability coefficient for
dichotomously scored items (0/1), assuming equal item difficulty.

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

kr21 function

<dl><dt>x</dt>
<dd>A data frame or matrix of item responses, with rows as persons
and columns as items. Items are assumed to be dichotomous (0/1).</dd></dl>

Arguments

KR-21 — kr21

<dl>

<dt>x</dt>
<dd>A data frame or matrix of item responses, with rows as persons
and columns as items. Items are assumed to be dichotomous (0/1).</dd>

</dl>

kr21: KR-21

Description

Usage

Value

Arguments

Details

Examples