Hello Sara:
It would help if I knew a little more about your experimental design. Is it
correct that there are 7 different conditions? Is each condition presented
multiple times during a run?
Exactly what statistical test are you trying to perform? What is the
hypothesis that you are testing?
It is not at all inconsistent to have very statistically significant results
within a given subject (e.g., p-value = .0001), and yet have insignificant
results across subjects (e.g, p-value > .1). This point has caused much
confusion in the past (and present).
The AUC calculation applies only if you are estimating the IRF curve at
multiple points (i.e., multiple time lags). What is the TR for your
experiment? What is the timing for the different conditions?
Doug Ward
