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 and the variables are higher, the omega coefficient would also be higher (as shown in the omega graph<http://rgm2.lab.nig.ac.jp/RGM_results/psych:omega.graph/omega.graph_002_big.png> )? Any advice is appreciated! Thanks. [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
