Programming the statistical procedures from SAS

cluster analysis after factor analysis: do I need to use all factors for cluster analysis?

Reply
Super Contributor
Posts: 312

cluster analysis after factor analysis: do I need to use all factors for cluster analysis?

I have a 127-question survey with 6-level likert type answers. With EFA I have kept 56 items and got 8 factors. With CFA (on sample not used in EFA) I confirmed these factors. so far all good.

 

When I tried to do cluster analysis, with 8 all factors I did not get clear solution (I used SAS, and used the CCC and pseudo F and T statistics indicators to judge the number of clusters; ccc: Cubic Clustering Criterion).

 

When I used 7 factors, I got a clearly solution of 3 clusters. All three indicators (CCC, pseudo F and statistics) suggested cluster number of 3. And further analysis with 3 clusters looks very reasonable to us.

 

my question is: Do I must use all 8 factors from EFA/CFA to do cluster analysis?

 

Trusted Advisor
Posts: 1,195

Re: cluster analysis after factor analysis: do I need to use all factors for cluster analysis?

Hi,

 

It depends, if you are happy with 3 cluster solutions with 7 factors then you can drop 8th factor.  

Ask a Question
Discussion stats
  • 1 reply
  • 149 views
  • 1 like
  • 2 in conversation