EFried posted on Thursday, January 31, 2013 - 6:53 am
We have 9 variables and want to perform EFA/CFA/ESEM with MPLUS. Variables are between 0.00 and 1.00 with an excess of zeroes, we're currently multiplying them with 100 and use COUNT since they are poisson distributed.
Unfortunately, all 9 variables always sum to exactly 1 for each person, leading to non-convergence.
Have you dealt with this issue before and would have recommendations as to how to solve this?
Without understanding the motivation for factor analysis in this situation, one simple approach is to delete 1 of the 9 variables so they don't sum to 1; it sounds like the 9th variable doesn't carry any extra information.
I don't know how relevant this is but, sociometric analysis using cross-classified models is described by Hox in his multilevel book, section 9.2.