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2012 Oct 10
1
omega vs. alpha explanation
Dear all
I wonder if someone can explain what is the main difference between omega
and alpha reliabilities?
I understand an omega reliability is based on hierarchical factor model as
shown in this graph<http://rgm2.lab.nig.ac.jp/RGM_results/psych:omega.graph/omega.graph_002_big.png>,
and
alpha uses average inter-item correlations.
1. What I don't understand is, in what condition, omega reliability
coefficient would be higher than alpha coefficient, and vice versa?
2. Can I assume if the correlations between the subfactors a...