How would you be able to tell if they were using 'mental stimulus' or not? | Hacker News

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AQuantized on Sept 1, 2021 | parent | context | favorite | on: Man can change his pupil size on command

How would you be able to tell if they were using 'mental stimulus' or not?

weeblewobble on Sept 1, 2021 [–]

It's in the abstract of the paper. They used fMRI

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