Dear Torben, thank you for all your comments
I still have a question (two indeed) and maybe you can help me on this
(other comments are also welcome).
In the previous e-mails, we looked at the effect of setting motion
parameters as variables of interest or not. My question concerns other
variables, as for example the answer of subjects.
Let say I have three conditions A, B, C with C the case in which
subjects have to answer (I don't want to look at that .. it's just to
keep awake my subjects). My idea was to set C as variable of no
interest... Do you think it's a good idea or is it better to put all
conditions as variables of interest?
Similarly, if I have 3 conditions A B and C = rest, is it better to set
C as variable of interest, of no interest or to leave this condition
implicit. Mauro Pesenti told me that in this case the implicit condition
should be better ...
> when possible and if one is not interested in fix/rest per se, it is
better to leave it implicit.
> it has something to do with estimation of the model that is over
determined if all conditions are declared,
> i.e., the 3d being totally predicted if you know the other 2
Thank you
Best,
Cyril
|