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| From | <Seyi.Soremekun@lshtm.ac.uk> |
| To | <statalist@hsphsun2.harvard.edu> |
| Subject | st: calculate alpha after polychoric factor analysis |
| Date | Mon, 13 Feb 2012 13:54:14 +0000 |
Dear Stata Listers, I would like to estimate the equivalent of Cronbach's alpha after factor analysis conducted on a polychoric matrix of ordinal, Likert items. I started out in a pretty standard way thus: polychoric var1 - var29 display r(sum_w) // check number of respondents answered all = 331 matrix r = r(R) factormat r, n(331) factors(3) ipf alpha? Is there such functionality available, or might I have to re-do the whole analysis in R or SAS? thanks, Seyi Dr Seyi Soremekun Faculty of Epidemiology and Public Health London School of Hygiene and Tropical Medicine London WC1E 7HT +442079272464 * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/