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 responses depend on two properties of the participants that
I know to be related to each other (height and weight, so they need to be
considered together as an interaction). More importantly, I need to understand
how this relationship modulates according to the type of stimulus participants
were presented to.
Based on my understanding of lme syntax, the formula I have to use should be
the following (because I am only interested in the interaction factor of Weight
and Height)
lme_dv <- lme(dv ~ Weight:Height:Stimulus_Type, data = scrd, random = ~ 1 |
Subject)
Am I correct?
Thank you in advance
Best regards
Angelo
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