Dear list,
I need an help to understand the syntax of lme to fit my model according to the
analysis I want to perform.
My dependent variable resulted from a perceptual experiment in which responses
of participants were measured twice for each provided stimulus. My goal is to
verify whether the
Hi Angelo,
it's dangerous to fit a model that includes interaction effects but omits
main effects. Among other things, what can happen is that the statistical
tests become scale dependent, which is most unattractive.
I think that you should include the main effects in your model, even as
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