Hi
I am a student and am new to fMRI and would appreciate any advice of the
following. I should describe a little about my study before i ask my
question.
One test group, Event related fMRI design, 3 video stimuli, duration ~ 4s
each,
Can anyone tell me if counterbalancing is required and if so how do i do
it for 3 stimulus, i am getting a little confused with the latin squares.
Also, i would like to jitter my ERfMRI design, that is, vary the
interstimulus interval (ISI), i was thinking of a mean interstimulus
interval of around 5seconds, does this seem reasonable?
i am also concerned about the range of the ISI around the mean, and i
have'nt seen it discussed much in the literature. Does anyone have a
recommendation, for example would 5 +/- 3 seconds be ok?
If you think you may be able to advise me but require further information
please get in touch, any help will be much apprciated.
Kind regards
John McLean
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