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Date:         Mon, 11 May 1998 10:32:49 +1100
Reply-To:     John Reece <reece@RMIT.EDU.AU>
Sender:       "SPSSX(r) Discussion" <SPSSX-L@UGA.CC.UGA.EDU>
From:         John Reece <reece@RMIT.EDU.AU>
Subject:      Re. Post-hoc analyses
Content-Type: text/plain; charset="us-ascii"

>I've just recently begun using SPSS V.6.1.4 Advanced (Windows) and I'm >interested in doing post-hoc analyses of repeated measure ANOVAs. From >what I can tell though, this program will only let me do a post-hoc of a >one-way ANOVA. It seems odd that it'd be limited to that test only. Am I >misunderstanding something? Is there a way to run a Tukey or Scheffe >based on a repeated measures?

There is a macro for use with SPSS 6.1.x for carrying out post-hocs on repeated measures, but it's not necessary. Just carry out a series of paired-samples t-tests on the variables that were involved in the initial analysis, making sure that you evaluate each comparison against an alpha-level adjusted using a Bonferonni-type procedure. Note that if you are going to do this, there is no compelling reason to carry out the overall ANOVA in the first instance.

+----------------------------------------------------------------+ |John Reece, PhD | |Dept. of Psychology & Intellectual Disability Studies | |RMIT University Phone: +61.3.9925.7512 | |PO Box 71 Fax: +61.3.9925.7303 | |Bundoora VIC 3083 | |AUSTRALIA | +----------------------------------------------------------------+

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