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Happy Holidays.
I am using EFA to develop a UFO scale. I've collected 340 surveys. The
surveys contain students' responses to 40 statements.
I've also collected age and gender information for each student.
Q: I've seen in the literature demographics included in EFA, but no
explanation was given about the why. Does anyone have a reference to the
why?
I will use three criteria to determine number of factors: eigenvalues > 1,
parallel analysis, and scree Plot. Then I plan to run another analysis and
examine the communalities. Variables with communalities < .30 will be
removed. Once that is done, I plan to re-analyze the data.
Q: I'm looking for a reference that discusses the removal of variables based
on their communality values.
Any help will be appreciated.
Thank you,
Stephen Salbod, Pace University, NYC
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