[R-sig-ME] ERPs lme covariates

[Alexandre Obert]

Dear all,

I'm working on ERPs data from a language comprehension study and I'm 
confronting to some problems with items' features.
Briefly, participants saw words on a screen and have to decide if 
they're meaningful or not.
Some of them were meaningful (condition 1), others not (condition 2) and 
others were ambiguous (condition 3).
Using classical ANOVA, I observed significant differences.
However, words came with characteristics such as frequency, number of 
letters and so on...that I would like to control for.
In other words, I would like to test the effect of the condition and 
control the words' features in a same analysis.

I think that lme from lme4() could compute such analysis, is-this right?

Regards,

-- 
Alexandre OBERT