Hi Rick,
I was confused myself and realized that we should not just throw away additional volumes that were acquired at the end. The study was designed so that 50 TRs included the various stimuli as well as fixation crosses for "rest." After TR 50, the participant would see the slide "rest" twice (2 additional volume acquisitions), then E-Prime turned off and the 2 more volumes were acquired before the participant was taken out of the scanner (I have to check with our MRI physicist again regarding any reasoning). For the last volumes participants did not look at the fixation cross that we used otherwise for "rest" but the volumes would be still considered rest. So, based on the foregoing thoughts I would agree with you not to exclude these, correct?
Maria