I am using Stata 15 and comparing the results between Maximum likelihood exploratory factor analysis (ML EFA) and Confirmatory factor analysis (CFA) based on the one-factor model.
Here is an example of the data
Code:
clear input float(item13 item14 item15 item16) 5 5 5 5 5 4 4 4 5 4 5 5 4 4 4 4 5 5 4 5 5 5 4 4 5 5 5 5 5 5 4 4 5 5 5 5 5 4 4 4 5 5 5 5 5 5 5 4 5 5 5 4 4 5 5 5 5 4 4 4 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 4 5 5 5 5 5 5 5 5 5 5 5 4 5 5 5 5 4 5 5 5 5 5 5 5 5 4 5 5 5 5 4 4 4 4 5 4 5 5 5 5 4 4 4 4 4 5 4 5 4 5 5 5 5 4 5 5 5 5 5 5 5 5 5 5 5 5 4 4 5 4 5 5 5 5 4 4 4 4 5 5 5 5 5 5 4 5 4 3 4 5 4 4 3 2 5 5 5 5 5 5 5 5 5 5 5 5 4 4 4 2 4 4 4 5 4 4 4 4 5 5 5 5 4 4 4 4 4 5 3 4 4 4 3 3 5 5 4 4 4 4 4 3 4 4 4 4 5 5 4 5 4 5 3 3 4 4 4 4 4 3 1 2 5 5 5 5 5 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 5 5 5 4 4 4 4 4 4 4 4 4 4 5 4 3 1 1 1 1 4 4 4 4 5 5 5 4 5 5 5 5 5 5 5 4 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 4 5 5 5 5 5 5 5 5 5 5 5 4 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 4 4 4 4 4 5 5 5 5 4 5 5 4 5 5 5 5 5 5 4 5 5 5 5 5 4 5 4 4 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 end
Code:
factor item13-item16, factors(1) ml sem(X->item13-item16), stand
the uniqueness from ML EFA and the residual variances from CFA are same but their log likelihoods are different.
Given that CFA is more flexible than EFA in general, is there anyway to make the results of ML EFA same as the results of CFA in this situation?
I also want to know why their log-likelihoods are different.
Thank you
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