Fritha Milne posted on Tuesday, September 06, 2011 - 9:04 pm
Hi, I am wanting to calculate factor scores from an EFA to use in further analyses. I understand that you cannot use the save=fscores command with an EFA. I have tried running my EFA in a CFA format using '@' to set the factor loadings to those calculated using Type=EFA. It runs fine, except it says that the factor scores cannot be calculated as one of the residual variances for the categorical variables are negative. How do I get around this problem? Can I set that residual variance to be positive?
I am a new user of MPLUS and I have two basic questions:
1) What is the estimation method that generate the factor scores when we use the command SAVE = FSCORES;
2) Althought I have read the Appendix 11 of the MPLUS user guide, I am not able to compute factor scores using WLSMV method. Is that possible with a simple sintax? That appendix is completely techinal and I could not implement it.
Running Principal axis factoring with promax rotation in SPSS I extracted 2 factors out of 25 variables (measures). I saved the factor scores using “regression” method and intending to use them as composite scores in further analysis (Mancova) as DVs, while I have two IVs each with two levels as well as 3 covariates.
What I need to know are: 1) about half of the saved reg scores have negative values, although variables have cleanly and positively loaded on two factors (I did it by defining fixed number of factors to extract). How should I interpret them? 2) will it be the correct method to use the saved scores as DVs in Mancova?
If this topic has been covered, can you please, direct me to it?