Date:         Tue, 2 Feb 1999 00:09:18 GMT
Reply-To:     robertcj@LAMAR.COLOSTATE.EDU
Sender:       "SPSSX(r) Discussion" <SPSSX-L@UGA.CC.UGA.EDU>
From:         robertcj@LAMAR.COLOSTATE.EDU
Organization: Deja News - The Leader in Internet Discussion
Subject:      RM ANCOVA

I have a question regarding a 2 x2 Repeated Measures (on the second factor)
ANCOVA printout on SPSS 8.0 for Windows.  My within-subjects factor (2
levels) is appearing in an interaction with my covariate in the "Test of
Within Subjects Factos" table.  I am guessing that this interaction (although
non-significant) is a test of the second assumption of covariance;  that is,
a covariate must effect all levels of a DV identically (homegeneity of
regression).  If I am right, then printing a within-subjects x covariate
interaction, SPSS is providing a quick, easy to use test of that assumption.
Let me know what you think. Thanks in advance Bob Johnson Graduate Student
Psychology Department Colorado State University
 
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