[R-sig-ME] Using variance components of lmer for ICC computation in reliability study

[David Duffy]

> Thing is: there is nothing like this for GLMMs. The lowest level of "residual variance" is basically the 
> distribution variance.
> You could think there would be such a thing with a threshold model, but it turns out that the total variance of 
> the liability scale is non identifiable, so nothing there either.

There is some information when there are multiple thresholds.