repeated measures anova

Posted by pjiman1 on Jul 19, 2011; 6:06pm
URL: http://spssx-discussion.165.s1.nabble.com/repeated-measures-anova-tp4613114.html

I'm trying to conduct a Repeated Measures ANOVA in SPSS. My syntax is pasted below.
I am trying to obtain results where both time and scale are repeated/within-subject factors and then test for time, scale, and time*scale effects---where all scales at all times listed as variables.

My data are in wide form. The wave variables are coded two ways: one set has variables wave1 to wave 5 each coded as 0,1, indicating which subject has data for each wave, the other set has variables w1 to W5 coded as 1,2,3,4,5 depending on which subject has data for each wave.

The problem is that I am unable to obtain an F-test for the time variable.
And I also cannot generate the interaction.



GLM wave1 wave2 wave3 wave4 wave5 W1Char W2Char W3Char W4Char W5Char
 /WSFACTOR=time 5 Polynomial
 /MEASURE=wave char
 /METHOD=SSTYPE(3)
 /PLOT=PROFILE(time)
 /EMMEANS=TABLES(time) COMPARE ADJ(BONFERRONI)
 /PRINT=DESCRIPTIVE ETASQ
 /CRITERIA=ALPHA(.05)
 /WSDESIGN=time.

I suspect that a) I have a fundamental error in my setup, b) I am overlooking a minor problem with my syntax, or c) I suspect that my wave variables (i.e. time) are coded incorrectly. Or is there some other problem with my setup?
I am not interested in recasting the analysis in SAS, HLM, or Structural Equation Modeling. My boss is looking for a quick and simple solution to this in SPSS.

Thanks in advance.