Hello List, We are designing a rapid event related paradigm, wherein a stimulus is presented for a duration of 300ms. We have been using optseq for generating sequences in the past, however , optseq requires that the event duration be a multiple of of TR or dPSD( sampling interval). In that case is it ok to create a design with a stimulus duration of 2 s ( which is our TR) and then split it into 300ms + 1700 ms, where the 1700 ms adds to the null period immediately following the stimulus? ( There is a null condition between each stimulus). Also, is it not important to start a new volume at the beginning of each stimulus? Any input is appreciated. Regards, Bosky Ravindranath
Laboratory for the Study of Emotion and Cognition, Stony Brook University, NY,11790