MVPA: the minimum numbre of trials required for the MVPA analysis



Hello, everyone

I’m new to MVPA and have a question about using MVPA in event-related fMRI data. there are 2 runs, and each run has 80 trials, including 2 conditions in the data. I’m not sure is it enough for using MVPA effectively?

Thank you for your help!

Indeed, this is not a large number of trials. In particular, you probably want to generalize from one run to the other, which leaves few trials to train your model.

I agree that it sounds low.

Also keep mind that asking “is it enough?” will most likely just get a “it depends” or an “enough for what” type of answer.

It is akin to the sample size and statistical power discussions you find in the mass univariate side of things