Date: Mon, 14 Feb 2005 12:48:09 -0500
Reply-To: "Thompson, Carol" <CThompson@anteon.com>
Sender: "SPSSX(r) Discussion" <SPSSX-L@LISTSERV.UGA.EDU>
From: "Thompson, Carol" <CThompson@anteon.com>
Subject: Re: Comments on SPSS documentation - algorithms location
Content-Type: text/plain; charset="us-ascii"
The SPSS support page (support.spss.com) has links to the statistical
algorithms used by SPSS v13. This page includes directions for logging
in if you do not already have a User ID. Once logged in, there is a
link to the algorithms from the navigation bar under the Statistics
link. I think someone in this thread also noted that the algorithms are
included on the CD.
Hope this helps.
Carol
Carol B. Thompson
Sr. Programmer/Analyst
Anteon Corporation
4220 S. Maryland Parkway, Suite 408B
Las Vegas, NV 89119
Ph: (702) 731-5550 x 207
Fax: (702) 731-4027
-----Original Message-----
From: SPSSX(r) Discussion [mailto:SPSSX-L@LISTSERV.UGA.EDU] On Behalf Of
David Harrell
Sent: Monday, February 14, 2005 9:19 AM
To: SPSSX-L@LISTSERV.UGA.EDU
Subject: Re: Comments on SPSS documentation - Supporting Dale
Hi Dale,
I fully support your complaint. One thing that always makes me nervous
when I publish results having used SPSS is that fact that I do not know
the mathematics SPSS is calculating behind the scenes to obtain the
results. Moreover, in certain circumstances, the mathematics can occur
in various methods and these methods have important differences.
Moreover, the result of these differences can have impacts on
interpretation. I agree with you Dale. Thank you for bringing this
important point to the discussion.
It would be great if I am simply ignorant of the location of these data.
If so, could someone please point me in the right direction?
Thank you,
David
******************************************
Dr. David B. Harrell, FRIPH
Innovation Research Director
Pro-Tech Services, Inc.
4338 Harbour Pointe Blvd SW
Mukilteo, WA 98275
Adjunct Professor of Pediatric Sleep Medicine
Tel: 425.322.0300
Fax: 425.322.0301
-----Original Message-----
From: SPSSX(r) Discussion [mailto:SPSSX-L@LISTSERV.UGA.EDU] On Behalf Of
Dale Glaser
Sent: Saturday, February 12, 2005 11:19 AM
To: SPSSX-L@LISTSERV.UGA.EDU
Subject: Comments on SPSS documentation
In the years of using SPSS since mainframe days, and the few years I
have been on this listserv, I have never used this as a forum for
gripes, but I'd like to register a minor one and see if I'm in the
minority!! This past week I had the opportunity to use PLUM for
proportional odds modeling (AKA: ordinal regression). When I accessed
the manuals to aid in interpretation of the Threshold and Location
parameters, they are woefully amiss in shedding any insight. Though I
had a suspicion that the Threshold parameters are calculated similarly
to how the same parameters are calculated via PRELIS for deriving the
polychoric correlation matrix, I wanted unequivocal confirmation of
such, which the manuals do not do (though I can always access the
statistical algorithms if need be). That being said, doesn't it seem in
the "good old days" the SPSS manuals actually were fairly illuminating
in the mathematical/statistical details in the output? I actually found
them, alongside other texts, to be very educational. Nowadays, the
manuals are just on the CD and even then , they are nothing more than
details on point-and-click.
Reading Long's "Regression Models for Categorical and Limited Dependent
Variables" last night made very clear the interpretation for both the
proportional odds model and multinomial logistic model, but it would be
nice to have that level of information in the SPSS manuals.
Just a comment/frustration that I wonder if other SPSS users also
have........thank you...Dale
Glaser Consulting
Dale Glaser, Ph.D.
Consultant/Lecturer (SDSU/USD/AIU)
4003 Goldfinch St, Suite G
San Diego, CA 92103
phone: 619-220-0602
fax: 619-220-0412
email: glaserconsult@sbcglobal.net
website: www.glaserconsult.com
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