Hostname: page-component-7dd5485656-dk7s8 Total loading time: 0 Render date: 2025-10-30T03:58:09.752Z Has data issue: false hasContentIssue false
  • English
  • Français

A Note on the Estimation of Test Reliability by the Kuder-Richardson Formula (20)

Published online by Cambridge University Press:  01 January 2025

Ledyard R Tucker
Ledyard R Tucker*
Affiliation:
Educational Testing Service
Get access Rights & Permissions [Opens in a new window]

Abstract

The Kuder-Richardson formula (20) is rewritten to be identical with the simplest formula, (21), except for the addition of a term involving the standard deviation, σp, of the item p's. If σp can be estimated, a rapid and superior estimate of test reliability is possible in contrast to the simpler formula (21) used when the number of items and mean and standard deviation of test scores are known.

Information

Type
Original Paper
Information
Psychometrika , Volume 14 , Issue 2 , June 1949 , pp. 117 - 119
Copyright
Copyright © 1949 The Psychometric Society

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Article purchase

Temporarily unavailable

Footnotes

*

Kuder, G. F. and Richardson, M. W. The theory of the estimation of test reliability. Psychometrika. 1937, 2, 151–160.