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Hi Freesurfer Developers,
I am analyzing a fear conditioning imaging study and am attempting to regress out the shock/unconditioned stimulus by adjusting the modulation weights in my par file. I set the stimuli presented with the shock (CS+) with a modulation weight of -1 and set all other unshocked/unpaired stimuli (CS- and fixation) with a weight of 1.
Similarly, we have a few CS+ trials where the participants are expecting a shock but didn't receive one -- I have been setting these with a modulation weight of 1 similar to the CS- and fixation stimuli.
I attached a copy of our .par file. Could you let me know if this makes sense for our analyses?
Best, Gillian Grennan
why are you doing this with modulation instead of just designating 3 different conditions?
On 3/28/2023 1:36 PM, Gillian Grennan wrote:
External Email - Use Caution
Hi Freesurfer Developers,
I am analyzing a fear conditioning imaging study and am attempting to regress out the shock/unconditioned stimulus by adjusting the modulation weights in my par file. I set the stimuli presented with the shock (CS+) with a modulation weight of -1 and set all other unshocked/unpaired stimuli (CS- and fixation) with a weight of 1.
Similarly, we have a few CS+ trials where the participants are expecting a shock but didn't receive one -- I have been setting these with a modulation weight of 1 similar to the CS- and fixation stimuli.
I attached a copy of our .par file. Could you let me know if this makes sense for our analyses?
Best, Gillian Grennan
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Gillian Grennan