[VoxBo] "scale by trial count" question

[Daniel Y Kimberg]

Ranjani Prabhakaran wrote:
> I've got 16 different trial types, and since I'm also coding
> incorrect trials - that makes for 32 trial types in my condition
> function.  There are some cases where I've got 12 correct trials
> (out of 14 total trials) of a particular trial type (A) and 7
> correct trials (out of 14 total trials) for a particular trial type
> (B).  Since there are a different number of correct trials for each
> trial type, would it make sense to "scale by trial count" to make
> sure that correct A trials aren't weighted more when comparing A
> vs. B?

Your covariates will still model the mean signal levels for their
respective trial types, so you probably wouldn't want to scale them by
trial count, unless I'm missing something.  It would probably help if
someone who's had a use for this option could chime in, but it's
possible no such person is reading this list.  I'll see if I can get
Geoff to reply, I believe this option was his creation.

dan