[R-sig-ME] Dropping correlations bet. random-effects in lme4 syntax

[Phillip Alday]

You can split the specification of your grouping to achieve this, at
least in part:

lmer(y ~ A * B * C + (A * C | group) + (B|group) , data = data)

Note that life gets tricky with the interaction terms.

Phillip

On 03/10/2020 06:35, Simon Harmel wrote:
> Hello all,
>
> I know to drop all correlations among all level-1 predictors in the random
> part of an lmer() call, I can use `||`. But I was wondering how to drop
> correlations (a) "individually" or (b) "in pairs"?
>
> Example of (a) is how to drop the correlation of B with others (A & C)?
> Example of (b) is how to drop the correlation between B and C?
>
> lmer(y ~ A * B * C + (A * B * C  || group), data = data)
>
> Thanks,
> Simon
>
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