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2024-11-11

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Pupil Size Is a Marker of Intelligence (getpocket.com)

submitted 2 months ago by m3t00@lemmy.world to c/science@lemmy.world

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source URL: a Firefox start page story with many links to sources for further reading.

getpocket.com - seems not too spammy though looks like click-bait. lmk. usually don't notice them on new tabs

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[–] acosmichippo@lemmy.world 29 points 2 months ago* (last edited 2 months ago) (1 children)

this study is from 2016. a more recent study from 2021 was not able to replicate the results and says other studies have had mixed results as well.

edit: and a response from one of the original authors

i don’t have time to deep dive now, but suffice it to say this is far from settled.

[–] givesomefucks@lemmy.world 10 points 2 months ago

Really good study, but it looks like the only things with a stronger correlation than attention control score and resting pupil size was caffeine and nicotine.

And it's concerning so many participants couldn't verify nicotine/caffeine consumption when those are the biggest connections when they disclose their sample was "moderate".

We'd also have to get into how nicotine/caffeine would be "performance enhancing" for these kinds of tests, yet would make the pupils contract. They should have tossed the participants who couldn't report nicotine/caffeine instead of including them.

But ideally it would have just been participants who had abstained from either for 24 hours. Good luck with that tho.