

How many factors to choose in EFA 

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Yue Ma posted on Monday, November 20, 2017  4:18 pm



Hello, I am using EFA on 7 indicators, here is what I got: SUMMARY OF MODEL FIT INFORMATION Model / # of Parameters / ChiSquare / DF / PValue 1factor: 21, 255.255, 14, 0.0000 2factor: 27, 12.945, 8, 0.1138 3factor: 32, 1.338, 3, 0.7202 Models Compared / ChiSquare / DF / PValue 1factor against 2factor: 233.179, 6, 0.0000 2factor against 3factor: 15.873, 5, 0.0072 Should I choose 2factor model given that the pvalue = 01138 is not significant for the 2factor model, or should I choose 3factor model given that 2factor against 3factor p=0.0072 is significant? I also wonder how to count the number of parameters for EFA Thank you! 


The 2factor model fits so no need to use more factors. EFA parameter counting is shown in our video and handout for Short course Topic 1 on our web site. See the Short Course video web page: http://www.statmodel.com/course_materials.shtml 

Yue Ma posted on Monday, November 20, 2017  8:40 pm



Thank you, Dr. Muthen! 

Kathy Xiao posted on Tuesday, April 10, 2018  5:22 am



Hi Dr. Muthen, I ran a EFA from 1>5 factors. The results shows from 1 to 4 models, the p values are all significant. For 5factor model , it shows “NA”. And the “n1 factor against n factor” comparison are all significant. Inspection of eigenvalues shows only the 1st factor has >1 eigenvlaue. In this case, shall I choose the 1factor model? Can I tell if alternative models (2,3,4 factor mods) are less fit than 1 factor model? Thanks very much !! 


These general analysis strategy questions are better suited for SEMNET. 

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