Re: Factor analysis

Posted by Art Kendall on Jan 05, 2014; 10:10pm
URL: http://spssx-discussion.165.s1.nabble.com/Factor-analysis-tp5723780p5723781.html

What is the goal of your factor analysis?
Are you trying to create summative scales?

Are you interested in accounting for the variance that is common to the variables or are you interested in accounting for the unique variance also?

Did you use parallel analysis to determine the number of factors to retain? If not how did you decide how many factors to retain?

What constitutes a case in you data? how many cases do you have?

How many variables were input to the PCA?

How many factors did you retain?

Did you use varimax rotation? if not, how did you choose the rotation method?

On 1/5/2014 4:50 PM, Promises [via SPSSX Discussion] wrote:

1. What do I do if the Principal Components Aanalysis factors (clusters of variables) do not produce common underlying themes that can be explained as a real world construct? The variables are more or less all over the place...
 
2. Could I remove variables/items prior to conducting PCA, if for example I find that they're outliers, following descriptive analysis?
 

I will be grateful for any guidance you can offer. Thanks in advance.

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