SPSSX-L archives -- February 2011 (#312)

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 ?
Comments:	To: Mbaye Fall Diallo <mbayefall0481@hotmail.com>
In-Reply-To:	<DUB101-w4621137B8EFDA8FC4A3D6FB7D60@phx.gbl>
Content-type:	text/html; charset=windows-1252

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta content="text/html; charset=windows-1252" http-equiv="Content-Type"> </head> <body bgcolor="#ffffff" text="#000000"> 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. 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. Depending on your audience you still may want to put a few sentences in to point to these citations and briefly state your reasoning. For example: "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." "The substantive results did not depend on the choice of extraction method. The substantive results were the same using other methods of extraction." "Using xyz gave clearer results than lmn in that ..." "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." 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." P.S. 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. 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." Art Kendall Social Research Consultants On 2/20/2011 10:12 AM, Mbaye Fall Diallo wrote: <blockquote cite="mid:DUB101-w4621137B8EFDA8FC4A3D6FB7D60@phx.gbl" type="cite"> <style></style> Hi dear all, Thanks again for all your comments. I agree with what Paul said. @ Art : have a look on the following references for more details about why I used ESEM and oblique rotation : Asparouhov, Tihomir and Muthén, Bengt (2009), 'Exploratory Structural Equation Modeling', Structural Equation Modeling: A Multidisciplinary Journal,16:3,397 — 438. 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. 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. Iacobucci, Dawn (ed.) (2001), Journal of Consumer Psychology’s Special Issue on Methodological and Statistical Concerns of the Experimental Behavioral Researcher, 10 (1&2), Mahwah, NJ: Lawrence Erlbaum Associates. See Factor Analysis, (See p.78). Best, Mbaye, <hr id="stopSpelling">Date: Sat, 19 Feb 2011 21:11:25 -0600 From: <a class="moz-txt-link-abbreviated" href="mailto:Paul.R.Swank@uth.tmc.edu">Paul.R.Swank@uth.tmc.edu</a> Subject: Re: What communalities and matrice to report ? To: <a class="moz-txt-link-abbreviated" href="mailto:SPSSX-L@LISTSERV.UGA.EDU">SPSSX-L@LISTSERV.UGA.EDU</a> <meta http-equiv="Content-Type" content="text/html; charset=windows-1252"> <meta name="Generator" content="Microsoft SafeHTML"> <style> .ExternalClass p.ecxMsoNormal, .ExternalClass li.ecxMsoNormal, .ExternalClass div.ecxMsoNormal {margin-bottom:.0001pt;font-size:12.0pt;font-family:'Times New Roman','serif';} .ExternalClass a:link, .ExternalClass span.ecxMsoHyperlink {color:blue;text-decoration:underline;} .ExternalClass a:visited, .ExternalClass span.ecxMsoHyperlinkFollowed {color:purple;text-decoration:underline;} .ExternalClass p {margin-right:0in;margin-left:0in;font-size:12.0pt;font-family:'Times New Roman','serif';} .ExternalClass span.ecxEmailStyle18 {font-family:'Calibri','sans-serif';color:#1F497D;} .ExternalClass .ecxMsoChpDefault {font-size:10.0pt;} @page WordSection1 {size:8.5in 11.0in;} .ExternalClass div.ecxWordSection1 {page:WordSection1;}

</style> <div class="ecxWordSection1"> 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. <div> Dr. Paul R. Swank, Professor and Director of Research Children's Learning Institute University of Texas Health Science Center-Houston </div> <div> <div style="border-width: 1pt medium medium; border-style: solid none none; border-color: rgb(181, 196, 223) -moz-use-text-color -moz-use-text-color; padding: 3pt 0in 0in;"> From: SPSSX(r) Discussion [<a class="moz-txt-link-freetext" href="mailto:SPSSX-L@LISTSERV.UGA.EDU">mailto:SPSSX-L@LISTSERV.UGA.EDU</a>] On Behalf Of Mbaye Fall Diallo Sent: Thursday, February 17, 2011 3:03 PM To: <a class="moz-txt-link-abbreviated" href="mailto:SPSSX-L@LISTSERV.UGA.EDU">SPSSX-L@LISTSERV.UGA.EDU</a> Subject: What communalities and matrice to report ? </div> </div> Hi dear all, 1. I am using factor analysis (ML extraction). I would like to know what communality to report : initial or extraction ? 2. I used a Promax rotation. I would like to know what matrice to report : pattern matrix or structure matrix ? Thanks in advance for your help. I would appreciate if you can provide some references. Best, Mbaye. </div> </blockquote> </body> </html>

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