[R] R2 in multilevel modelling

Joshua Wiley jwiley.psych at gmail.com
Mon Apr 30 17:08:39 CEST 2012


Hi Chiara,

If you just want to compare model fit, you could use a LRT between
models where you do and do not estimate the variance/covariance matrix
of random effects.

R^2 in mixed models do not have the same nice properties they do in
fixed effects models.

Cheers,

Josh

On Mon, Apr 30, 2012 at 3:21 AM, klair87 at libero.it <klair87 at libero.it> wrote:
> Goodmorning everybody,
> i'm an italian statistician and i'm using R for research.
>
> Could someone tell me some indices to see the goodness of fit in multilevel
> modelling?
> I'm using the lmer function, and I want to know if my model fit well my
> data.
> I actually want to justify the use of multilevel model instead the classical
> one.
>
> Hope someone can help me.
> Thank you.
>
> Greetings
> Chiara
>
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-- 
Joshua Wiley
Ph.D. Student, Health Psychology
Programmer Analyst II, Statistical Consulting Group
University of California, Los Angeles
https://joshuawiley.com/



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