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Coefficients Alpha, Beta, Omega, and the glb: Comments on Sijtsma
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Revelle, William; Zinbarg, Richard E. – Psychometrika, 2009
There are three fundamental problems in Sijtsma ("Psychometrika," 2008): (1) contrary to the name, the glb is not the greatest lower bound of reliability but rather is systematically less than omega[subscript t] (McDonald, "Test theory: A unified treatment," Erlbaum, Hillsdale, 1999), (2) we agree with Sijtsma that when considering how well a test…
Descriptors: Test Theory, Computer Software, Reliability