Posted by
Swank, Paul R on
Apr 10, 2007; 10:08pm
URL: http://spssx-discussion.165.s1.nabble.com/Design-analysis-help-tp1074985p1074987.html
This is also easily handled with a mixed models approach, wehre there
are typically more options for the variance covariance matrix than in a
repeated measures ANOVA.
Paul R. Swank, Ph.D. Professor
Director of Reseach
Children's Learning Institute
University of Texas Health Science Center-Houston
-----Original Message-----
From: SPSSX(r) Discussion [mailto:
[hidden email]] On Behalf Of
Gene Maguin
Sent: Tuesday, April 10, 2007 2:48 PM
To:
[hidden email]
Subject: Re: Design analysis help
Fred,
I would conceive of this as a repeated measures anova with cup as the
within factor (repeated measure) and brand/type as the between factor.
Repeated measures anova has stringent assumptions regarding the
within-group variance-covariance matrix (vcm) that can be checked. This
would be a good exercise for your class to work through the assumptions.
You also could analyze this as a multivariate anova (i.e., manova) but
while manova allows broader assumptions about the vcm, the price of
those broader assumptions is reduced power. Again, the class could work
through this analysis as well.
Gene Maguin