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index_hw
2012 Apr 12
0
Multivariate multilevel mixed effects model: interaction
Hello.
I am running a multivariate multilevel mixed effects model, and am trying
to understand what the interaction term tells me.
A very simplified version of the model looks like this:
model <- lmer (phq ~ -1 + as.factor(index_phq) * Neuro + ( -1 +
as.factor(index_phq)|UserID), data=data)
The phq variable is a categorical depression score on 9 depression items
(classified by the variable "index_phq"), and Neuroticism is a covariate
(random effect = the subjects of my study, they should be allowed to vary
in slope/...