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| [[BR]] == FS-FAST USE CASE 1: fMRI Sorkflow for Reasoning Study == === Experiment design === The experiment consists of 3 active conditions (+baseline), referred to as V, T and P.[[BR]] The task consists in solving visually presented problems in each of these conditions. Subjects respond using a button box.[[BR]] The paradigm is presented in 6 consecutive runs, each lasting 300s. In each run, two of the three conditions are shown to minimize subject confusion, and increase statistical power'''''**WHAT ARE THE EFFECTS ON POWER OF SHOWING ONLY A SUBSET OF THE CONDITIONS IN EACH RUN??'''''. The runs consist of [[BR]] Run 1: T-P [[BR]] Run 2: T-V [[BR]] Run 3: P-V [[BR]] Run 4: T-P [[BR]] Run 5: T-V [[BR]] Run 6: P-V [[BR]] This alternation allows for similar scanner drift effects across the different pairings of the conditions (i.e. tentatively the same amount of drift occurs between runs 1 and 4 and 2 and 5, assuming drift is linear). Within each run, the plates are presented using a pseudo-randomized (order the same for all subjects, but only known to the experimenter) event-related paradigm. Each plate presentation is considered an event, which can last between 1 and 10s, as the plate disappears when the subject responds or times out after 10 seconds (at which point the paradigm goes on by itself). In-between plates, a fixation cross is shown with a random ISI ranging from 1500 to 3500ms in 250ms steps. Every 6 plates, the fixation cross is held for a longer time, in order to match the total run duration across subjects**'''''IS THIS NECESSARY? WHY? IS THERE A BETTER WAY TO GO ABOUT IT THAN MY 'catchup times'?'''''. Thus, the 7th plate appears at t=75s, the 13th at t=150s and the 19th at t=225s. The total run time of 5minutes is therefore the same as if all plates timed out (10x24 + 2.5x24 = 300). [[BR]] The PAR files look like this: [[BR]] ||||||<tablewidth="30%">'''ParFile'''|| ||Init_time||condition_nb||duration||condition_name|| ||<:>0 || <:> 0 || <:> 2.5178 || <:> baseline || ||2.5178 || 2 || 2.3427 || perceptual ||4.8605 || 0 || 3.2763 || baseline ||8.1368 || 3 || 2.1638 || verbal ||10.3006 || 0 || 2.5216 || baseline ||12.8222 || 2 || 2.5746 || perceptual ||15.3968 || 0 || 2.0273 || baseline |
'''THIS IS A WORK IN PROGRESS AND LIKELY HAS MISTAKES. PLEASE IGNORE FOR NOW'''
FS-FAST USE CASE 1: fMRI Sorkflow for Reasoning Study
Experiment design
The experiment consists of 3 active conditions (+baseline), referred to as V, T and P.BR The task consists in solving visually presented problems in each of these conditions. Subjects respond using a button box.BR The paradigm is presented in 6 consecutive runs, each lasting 300s. In each run, two of the three conditions are shown to minimize subject confusion, and increase statistical power**WHAT ARE THE EFFECTS ON POWER OF SHOWING ONLY A SUBSET OF THE CONDITIONS IN EACH RUN??. The runs consist of BR Run 1: T-P BR Run 2: T-V BR Run 3: P-V BR Run 4: T-P BR Run 5: T-V BR Run 6: P-V BR This alternation allows for similar scanner drift effects across the different pairings of the conditions (i.e. tentatively the same amount of drift occurs between runs 1 and 4 and 2 and 5, assuming drift is linear). Within each run, the plates are presented using a pseudo-randomized (order the same for all subjects, but only known to the experimenter) event-related paradigm. Each plate presentation is considered an event, which can last between 1 and 10s, as the plate disappears when the subject responds or times out after 10 seconds (at which point the paradigm goes on by itself). In-between plates, a fixation cross is shown with a random ISI ranging from 1500 to 3500ms in 250ms steps. Every 6 plates, the fixation cross is held for a longer time, in order to match the total run duration across subjects**IS THIS NECESSARY? WHY? IS THERE A BETTER WAY TO GO ABOUT IT THAN MY 'catchup times'?. Thus, the 7th plate appears at t=75s, the 13th at t=150s and the 19th at t=225s. The total run time of 5minutes is therefore the same as if all plates timed out (10x24 + 2.5x24 = 300). BR The PAR files look like this: BR
Init_time |
condition_nb |
duration |
condition_name |
0 |
<:> 0 |
<:> 2.5178 |
<:> baseline |
||2.5178 || 2 || 2.3427 || perceptual ||4.8605 || 0 || 3.2763 || baseline ||8.1368 || 3 || 2.1638 || verbal ||10.3006 || 0 || 2.5216 || baseline ||12.8222 || 2 || 2.5746 || perceptual ||15.3968 || 0 || 2.0273 || baseline