Meeting assumptions in the estimation of reliability

Brian P. Shaw ()
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Brian P. Shaw: Indiana University

Stata Journal, 2021, vol. 21, issue 4, 1021-1027

Abstract: Researchers and psychometricians have long used Cronbach’s α as a measure of reliability. However, there have been growing calls to replace Cron- bach’s α with measures that have more defensible assumptions. One of the most common and straightforward recommended reliability estimates is ω. After a re- view of reliability and its estimation in Stata, I introduce the community-con- tributed command omegacoef. This command reports McDonald’s ω in a format similar to the base alpha command. omegacoef provides Stata users the ability to easily compute estimates of reliability with the confidence that the necessary statistical assumptions are met.

Keywords: omegacoef; McDonald’s ω; Raykov’s ρ; alpha; reliability; measurement (search for similar items in EconPapers)
Date: 2021
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Persistent link: https://EconPapers.repec.org/RePEc:tsj:stataj:v:21:y:2021:i:4:p:1021-1027

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DOI: 10.1177/1536867X211063407

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