Your Pupils Dilate When You Lie

January 31, 2011 at 2:00 am 5 comments

By Chad Upton | Editor

This is one of the reasons some poker players wear sunglasses (they also do it so they can stare at their opponents without being noticed).

In fact, the neurotransmitters that mediate pupil dilation are closely associated with arousal in general.

This was proven in a recent study which found that pupil dilation is closely associated with memory and attention functions. In controlled tests, researchers were even able to predict the precise moment when subjects made decisions, based solely on a change in pupil size.

Knowing this, you may want to stick to online poker.

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5 Comments Add your own

  • 1. L S  |  January 31, 2011 at 12:58 pm

    I was so angry once with pent-up anger that I could feel my eyes dilate. I went to the bathroom and it looked like I’d been to the eye doctor for those dilation drops! It was a weird experience, so I totally believe this!

  • 2. B  |  January 31, 2011 at 11:00 pm

    There is about as much science to this as there is to “lie” detectors. They are nothing more or less than biofeedback machines. As soon as anyone tries to bring in the amorphous idea that is “lie” versus “truth”, all science flies out the door.

    • 3. Chad Upton  |  January 31, 2011 at 11:23 pm

      Not sure if you read the study I linked to, but it seemed pretty convincing. I’m not a neurologist but I have consulted with one for some of my other posts. I’ll run it by him to see what he thinks.

  • 4. SeriousOpinion  |  February 27, 2011 at 12:04 am

    Haha I saw this on tv show called Lie To Me. Your pupils really dilate. I didn’t believe it at first when I saw it on the tv but after reading online it seems like a normal thing.

  • 5. Unintentional Housewife  |  March 15, 2011 at 11:32 pm

    What if you’re like me, and you’re really bad at poker? I never bluff. I ante, I call, I raise. I just never have any idea if my hand is really good enough to beat anyone else’s. Do you think that means that my eye dilation wouldn’t help my opponents? Not that I could make it in any kind of tournament anyway…


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