Date: Sun, 20 Feb 2011 11:06:04 -0500
Reply-To: Art@DrKendall.org
Sender: "SPSSX(r) Discussion" <SPSSX-L@LISTSERV.UGA.EDU>
From: Art Kendall <Art@DrKendall.org>
Organization: Social Research Consultants
Subject: Re: What communalities and matrice to report ?
In-Reply-To: <DUB101-w4621137B8EFDA8FC4A3D6FB7D60@phx.gbl>
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<font size="+1">These all give good ideas. However, it helps your
audience if you anticipate questions that might arise. By
comparing and contrasting the approach you use to what others
might use you help the audience understand. <br>
<br>
Today's computer environments make it almost trivial to try
different approaches. For example, running a parallel analysis
would have been a laughable idea 40 years ago. Last week I did a
40,000 case parallel analysis with 1000 random permutations in 50
minutes, less time than it would have take to do a 400 case
factor analysis in 1972.<br>
<br>
Depending on your audience you still may want to put a few
sentences in to point to these citations and briefly state your
reasoning.<br>
<br>
For example: <br>
<br>
"ML was used because it gave an additional idea on the number of
factors to retain (cite). Both ML and parallel analysis suggested
retaining k factors."<br>
</font><font size="+1"></font><font size="+1"><br>
"The substantive results did not depend on the choice of
extraction method. The substantive results were the same using
other methods of extraction."<br>
<br>
"Using xyz gave clearer results than lmn in that ..."<br>
<br>
</font><font size="+1">"Oblique rotation was used because a (cite),
b(cite, cite),and c. The goals of this analysis stated above were
distinct from scale creation uses of factor analysis in that
divergent validity was not a concern. There was not a reason to
disallow an item from being on more than one scale key."</font><br>
<font size="+1"><br>
<br>
Also, when you present the pattern and structure in formation, in
many contexts you would want to do more than say "This is the
pattern matrix." "This is the structure matrix."<br>
<br>
P.S.<br>
I had copies of these articles in a file that has been lost.
Unfortunately, I no longer have access to replacement copies so I
cannot take another look at them.<br>
<br>
I certainly agree that the Kaiser criterion of 1.00 merely was
used to minimize machine time which used to be very expensive. I
usually describe it as "there is no way I would want more than 10
factors, usually many fewer, but certainly not more so why waste
money."<br>
<br>
Art Kendall<br>
Social Research Consultants<br>
</font><br>
On 2/20/2011 10:12 AM, Mbaye Fall Diallo wrote:
<blockquote cite="mid:DUB101-w4621137B8EFDA8FC4A3D6FB7D60@phx.gbl"
type="cite">
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Hi dear all,<br>
Thanks again for all your comments. I agree with what Paul said.<br>
<br>
@ Art : have a look on the following references for more details
about why I used ESEM and oblique rotation :<br>
<br>
Asparouhov, Tihomir and Muthén, Bengt (2009), 'Exploratory
Structural Equation Modeling', Structural Equation Modeling: A
Multidisciplinary Journal,16:3,397 — 438.<br>
<br>
Sass, Daniel A. and Schmitt, Thomas A.(2010) 'A Comparative
Investigation of Rotation Criteria Within Exploratory Factor
Analysis', Multivariate Behavioral Research, 45: 1, 73 — 103.<br>
<br>
Kristopher J. Preacher and Robert C. MacCallum (2003), Repairing
Tom Swift’s Electric Factor Analysis Machine, UNDERSTANDING
STATISTICS, 2(1), 13–43. See p.25-26.<br>
<br>
Iacobucci, Dawn (ed.) (2001), Journal of Consumer Psychology’s
Special Issue on Methodological and Statistical Concerns of the
Experimental Behavioral Researcher,<br>
10 (1&2), Mahwah, NJ: Lawrence Erlbaum Associates. See Factor
Analysis, (See p.78).<br>
<br>
Best,<br>
<br>
Mbaye,<br>
<br>
<br>
<hr id="stopSpelling">Date: Sat, 19 Feb 2011 21:11:25 -0600<br>
From: <a class="moz-txt-link-abbreviated" href="mailto:Paul.R.Swank@uth.tmc.edu">Paul.R.Swank@uth.tmc.edu</a><br>
Subject: Re: What communalities and matrice to report ?<br>
To: <a class="moz-txt-link-abbreviated" href="mailto:SPSSX-L@LISTSERV.UGA.EDU">SPSSX-L@LISTSERV.UGA.EDU</a><br>
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<p class="ecxMsoNormal"><span style="font-size: 11pt;
font-family: 'Calibri','sans-serif'; color: rgb(31, 73,
125);">Also report the final communalities although they are
different depending on whether you consider the correlation
among factors or not. I usually reproduce the communalities
associated with the pattern matrix but there is some
disagreement as to whether the pattern or structure matrices
are best. Be prepared to report both.</span></p>
<p class="ecxMsoNormal"><span style="font-size: 11pt;
font-family: 'Calibri','sans-serif'; color: rgb(31, 73,
125);"> </span></p>
<div>
<p class="ecxMsoNormal"><span style="font-size: 11pt;
font-family: 'Calibri','sans-serif'; color: rgb(31, 73,
125);">Dr. Paul R. Swank, </span></p>
<p class="ecxMsoNormal"><span style="font-size: 11pt;
font-family: 'Calibri','sans-serif'; color: rgb(31, 73,
125);">Professor and Director of Research</span></p>
<p class="ecxMsoNormal"><span style="font-size: 11pt;
font-family: 'Calibri','sans-serif'; color: rgb(31, 73,
125);">Children's Learning Institute</span></p>
<p class="ecxMsoNormal"><span style="font-size: 11pt;
font-family: 'Calibri','sans-serif'; color: rgb(31, 73,
125);">University of Texas Health Science Center-Houston</span></p>
</div>
<p class="ecxMsoNormal"><span style="font-size: 11pt;
font-family: 'Calibri','sans-serif'; color: rgb(31, 73,
125);"> </span></p>
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<p class="ecxMsoNormal"><b><span style="font-size: 10pt;
font-family: 'Tahoma','sans-serif';">From:</span></b><span
style="font-size: 10pt; font-family:
'Tahoma','sans-serif';"> SPSSX(r) Discussion
[<a class="moz-txt-link-freetext" href="mailto:SPSSX-L@LISTSERV.UGA.EDU">mailto:SPSSX-L@LISTSERV.UGA.EDU</a>] <b>On Behalf Of </b>Mbaye
Fall Diallo<br>
<b>Sent:</b> Thursday, February 17, 2011 3:03 PM<br>
<b>To:</b> <a class="moz-txt-link-abbreviated" href="mailto:SPSSX-L@LISTSERV.UGA.EDU">SPSSX-L@LISTSERV.UGA.EDU</a><br>
<b>Subject:</b> What communalities and matrice to report
?</span></p>
</div>
</div>
<p class="ecxMsoNormal"> </p>
<p class="ecxMsoNormal"><span style="font-size: 10pt;
font-family: 'Tahoma','sans-serif';">Hi dear all,<br>
1. I am using factor analysis (ML extraction). I would like
to know what communality to report : initial or extraction ?
<br>
2. I used a Promax rotation. I would like to know what
matrice to report : pattern matrix or structure matrix ?<br>
<br>
Thanks in advance for your help. I would appreciate if you
can provide some references.<br>
<br>
Best,<br>
<br>
Mbaye.</span></p>
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