[pymvpa] Justification for trial averaging?

[Francisco Pereira]

I agree with every one of Brian's points, and I'll toss one more in.
You' want to average if the analysis you want to do is to look at
similarity patterns, rather than train classifiers. It might have to
be combined with permutation tests (e.g. you average within things
labelled as being in the same class within each label permutation).

Francisco