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Results tagged with mixed-model
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user 266329
Mixed (aka multilevel or hierarchical) models are linear models that include both fixed effects and random effects. They are used to model longitudinal or nested data.
4
votes
2
answers
70
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When you have a variable that can be both fixed and random, is there a right way to define i...
I have an outcome variable painRating which represents how painful a participant found a sensation. I can reasonably expect ratings to be affected by a painful stimulation. Thus I would like to run a …
4
votes
1
answer
399
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Should I remove a significant covariate from my mixed-effects model because it's underpowered?
I tried figuring out the answer by reading the comments in this thread but I am still confused. Should I remove a covariate from analysis when it comes as significant but power simulations finds that …
3
votes
1
answer
603
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Causal inference from mixed-effects modelling on non-experimental repeated-measures data?
This is a more conceptual question and I think it highlights my lack of knowledge of what can be assumed using mixed-effects modelling on a non-experimental repeated-measures data.
Let's pretend we ha …
5
votes
1
answer
253
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How to enter confounding variables and variables competing for exposure into a mixed-effects...
Let's imagine I am interested in the association between happiness and pain.
I run a study where I ask participants to rate both feelings, daily, for several days. However, I couldn't get all particip …