Date:         Tue, 29 May 2001 14:50:21 +0100
Reply-To:     gerard@spss.ie
Sender:       "SPSSX(r) Discussion" <SPSSX-L@LISTSERV.UGA.EDU>
From:         Gerard Egan <gerard@SPSS.IE>
Subject:      Factor analysis: Extraction
Content-Type: text/plain; charset="iso-8859-1"

I have a query. I am doing principal component analysis using the covariance
matrix. I notice that the dialog box "Factor Analysis: Extraction" suggests
for the extraction "eigenvalues over 1 times the mean eigenvalue". I would
like to know if this value is a standard value (just as eigenvalues over 1
is standard for the correlation matrix). If so, I I wonder if you have a
reference to this ?

Regards,

Gerard Egan

Marketing Executive
SPSS Ireland
Tel: +353 (0)1 415 0234
Fax: +353 (0)1 415 0235
Website: www.spss.com
email: gerard@spss.ie