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A comment on Man can change his pupil size on command. Parent comment

Re:Man can change his pupil size on command by AQuantized on Wednesday September 01, 2021 @10:04AM (#28379974)
How would you be able to tell if they were using 'mental stimulus' or not?
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Re:Man can change his pupil size on command by weeblewobble on Wednesday September 01, 2021 @10:29AM (#28380299)
It's in the abstract of the paper. They used fMRI
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