Date: Sun, 22 Mar 2009 08:20:29 -0500
Reply-To: Phil Schubert <firstname.lastname@example.org>
Sender: "SPSSX(r) Discussion" <SPSSX-L@LISTSERV.UGA.EDU>
From: Phil Schubert <email@example.com>
Subject: split plot or mixed between-within ANOVA
In a case where a mixed between-within ANOVA seems like the right
statistical tool, does anyone know if its possible to use this tool with
several "within" variables in the same model?
For example, suppose i have measures for 10 different continuous variables
at time 1, 2 and 3. These variables represent my "within-subjects"
variables and time represents my "within-subjects factor." Next, I have a
categorical grouping variable representing the "between subjects" variable.
Am i confined to testing one continuous variable (with 3 measurements) at a
time or is there some way to assess the three measurement points among all
10 variables at once?
I guess i am looking for the "within-between" equivalent of a multivariate
anova that allows assessing the significance of several dependent variables
at once; only in this case, i have multiple time measurements for each
dependent variable. Otherwise, I am concerned that executing 10
within-between anovas dilutes my alpha value.
Any ideas or insight would be greatly appreciated!
Abilene Christian University
Executive Vice President
ACU Box 29120
Abilene, Texas 79699-9120