One group - 3 sessions

Hi all,

I have got 30 healthy participants (no patient group). I am testing the test-retest reliability of a new MRI protocol. Each participant was scanned 3 times, a few weeks apart, which, I guess, translates into 3 "sessions" in the CONN toolbox. (My hypothesis is that my resting-state data will be the same across the three timepoints). However, how many "conditions" should I choose in the toolbox? 1 or 3?

Thank you!