Estimating reliability: A comparison of Cronbach's α, McDonald's ωt and the greatest lower bound

Paola Malkewitz, Camila; Schwall, Philipp; Meesters, Christian; Hardt, Jochen

doi:10.1016/j.ssaho.2022.100368

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Estimating reliability: A comparison of Cronbach's α, McDonald's ωt and the greatest lower bound

Published in Social Sciences & Humanities Open • Dec 12, 2022

Authors:

Camila Paola Malkewitz

Philipp Schwall

Christian Meesters

Abstract

Cronbach's alpha as a reliability estimate for a set of items has been repeatedly criticised. Using McDonald's omega or the Greatest Lower Bound (GLB) has been suggested instead. A simulation study using a single scale was performed on data with n = 60, 80, 120, 200, 300, 500 and 900 cases utilizing...

Subject

Cronbach's alpha

Omega

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