Power analysis for mixed-effects model

[LucieR]

Does anyone know how I can run a power analysis to determine the sample size for a linear mixed-effects model? Can this be done on G*Power?

Thanks

 

[hlsmith]

@spunky - what are you doing? Answer this question NOW.

 

[Dason]

I not sure about g power. But you can always simulate to estimate power.

 

[spunky]

Does anyone know how I can run a power analysis to determine the sample size for a linear mixed-effects model? Can this be done on G*Power?

Thanks

It can't be done in GPower. You'll need to approximate it through computer simulations,

 

[Buckeye]

Maybe I read or heard somewhere that power analysis' are often a simplification of the model that generates the data. As you start getting in the weeds with more complicated models, a power analysis for that specific model is harder to calculate. So, you do your best with what's tractable.

 

[Dason]

Maybe I read or heard somewhere that power analysis' are often a simplification of the model that generates the data. As you start getting in the weeds with more complicated models, a power analysis for that specific model is harder to calculate. So, you do your best with what's tractable.

Or you just simulate