*I have done lots of search to find out if lmer allows specification of
heteroscedastic error variances. For example I wish to fit a simple model
for response amplitude across 2 groups of diabetic patients, assuming
different error variance int the two diabetic groups. I know how to specify
heteroscedastic error variances in lme using weights option, but this does
not seem to be implemented in lmer. Am I right?*
**
*Is there other way of getting around heteroscedastic errors by adding
appropriate randome effects interaction term (as it was suggested on 17
June 2011 in r-sig-mixed-models archive)?*
**
*Thank you,*
*Gabriela*

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