Date: Wed, 2 Jan 2008 16:34:11 -0500
Reply-To: Megan Malloy <malloymm@YAHOO.COM>
Sender: "SPSSX(r) Discussion" <SPSSX-L@LISTSERV.UGA.EDU>
From: Megan Malloy <malloymm@YAHOO.COM>
Subject: Post Hoc Interactions
I have a study with 2 groups (Group 1 (N=12) and Group 2 (N=10)), all of
whom took 4 different tests of memory (Test 1= Visual Recall; Test 2= Visual
Recognition; Test 3= Verbal Recall; Test 4= Verbal Recognition). Using SPSS,
I ran a repeated-measures ANOVA, Within factor TEST (4 levels) and Between
factor GROUP (2 levels), and the overall result was significant.
I am interested in answering whether the difference between Group 1 and
Group 2 on recall is significantly greater than the difference between Group
1 and Group 2 on recognition - ?
Also, I am interested in whether the difference between Group 1 and Group 2
on visual is significantly greater than the difference between Group 1 and
Group 2 on verbal - ?
What is a valid way to look at these interactions? How do I do post hoc
testing to get at the answers to these two questions?
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