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Date:         Sat, 3 Sep 2005 20:47:09 -0500
Reply-To:     "Granaas, Michael" <mgranaas@usd.edu>
Sender:       "SPSSX(r) Discussion" <SPSSX-L@LISTSERV.UGA.EDU>
From:         "Granaas, Michael" <mgranaas@usd.edu>
Subject:      Re: MANOVA vs. Repeated Measures ANOVA
Comments: To: "Jin, Shihou" <sjin@udsmr.org>
Content-Type: text/plain; charset="iso-8859-1"

>Jin, Shihou >One problem to analyze pre-post data with ANCOVA instead of ANOVA is >that it might lead to collinearity problem if the change score is highly >related the pretest score

I don't see how this could be a problem. Collinearity is only a problem when it exists among the predictors.

Michael

**************************************************** Michael Granaas mgranaas@usd.edu Assoc. Prof. Phone: 605 677 5295 Dept. of Psychology FAX: 605 677 3195 University of South Dakota 414 E. Clark St. Vermillion, SD 57069 *****************************************************


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