[R-sig-ME] R-sig-mixed-models Digest, Vol 77, Issue 11

[Volker Dellwo]

Hi Jake,

thanks a million for your answer!

> It's hard to make any definite diagnoses without seeing
> the output of the commands you listed, but my suspicion is that you
> have your "speaker" and "sentence" factors represented in your data
> frame as numeric objects (e.g., integers 1 to length(speaker))
> instead of factor objects. So when you try to test speaker or
> sentence by putting them in the model as fixed effects, the model
> tries to fit a non-sensical slope to the arbitrary x-values given by
> the factor labels.
 > Obviously this kind of test doesn't make sense.

Yes, I totally agree. But then I did this:
	speaker <- factor(bt.data$speaker);
	sentence <- factor(bt.data$sentence);
	tempo <- factor(bt.data$tempo);
 From what I read it seems to me that the three variables should then be 
treated as factor objects; am I right or wrong here?

With is.factor(speaker), for example, I receive the response "TRUE"

Best wishes,
Volker