Posted by
Oliver on
Mar 16, 2021; 8:11pm
URL: http://spssx-discussion.165.s1.nabble.com/Interpretation-of-interaction-with-time-varying-predictor-Growth-model-tp5740294p5740314.html
Bozena,
Thanks for your input. I agree with you that the "estimates of fixed
effects" box from the SPSS output file will generate interaction terms with
p-values across all levels, but the problem is the "Reference category" that
SPSS uses by default. My understanding is that SPSS uses the highest
category as the reference, which may not be enough and relevant. In my
output, I see that the interaction is significant when comparing Time1
versus Time4, but I'm particularly interesting in examining what happens
with the interaction when Time0 (baseline) is used as the reference
category.
Is there any way to change the reference category ? This way, it would solve
the problem and perhaps avoid the need to rely on planned interaction
contrasts.
Thanks again everyone.
O.
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http://spssx-discussion.1045642.n5.nabble.com/file/t340718/Interaction%3B_output.jpg>
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