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Science Forum Index » Space - Consult Forum » how to compare two correlation matrices
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| asia |
 Posted: Mon Jan 01, 2007 5:11 pm |
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Guest
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Dear all
I am trying to compare two polychoric correlations matrices. The data
is a set of answers to a questionnaire. I divided my dataset into two
groups according to gender and right now I am trying to check whether
there are differences between two polychoric correlations matrices
calculated for each gender.
Any idea how I can do this using SAS? |
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| Ray Koopman |
| Posted: Tue Jan 02, 2007 4:14 am |
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Guest
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asia wrote:
Quote: Dear all
I am trying to compare two polychoric correlations matrices. The data
is a set of answers to a questionnaire. I divided my dataset into two
groups according to gender and right now I am trying to check whether
there are differences between two polychoric correlations matrices
calculated for each gender.
Any idea how I can do this using SAS?
It depends on how the polychorics were estimated (true or quasi
maximum likelihood). In either case, it will probably require the raw
data, not just the correlation matrices. Ask in comp.soft-sys.sas. |
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| John Uebersax |
| Posted: Tue Jan 02, 2007 5:06 am |
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Guest
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Someone should be able to answer this question in the SEMNET
listerv/discussion group.
http://bama.ua.edu/archives/semnet.html
--
John Uebersax PhD
Ray Koopman wrote:
Quote: asia wrote:
Dear all
I am trying to compare two polychoric correlations matrices. The data
is a set of answers to a questionnaire. I divided my dataset into two
groups according to gender and right now I am trying to check whether
there are differences between two polychoric correlations matrices
calculated for each gender.
Any idea how I can do this using SAS?
It depends on how the polychorics were estimated (true or quasi
maximum likelihood). In either case, it will probably require the raw
data, not just the correlation matrices. Ask in comp.soft-sys.sas. |
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| Back to top |
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