The eyes have it: Men do see things differently to women

The way that the visual centers of men and women’s brains works is different, finds new research published in BioMed Central’s open access journal Biology of Sex Differences. Men have greater sensitivity to fine detail and rapidly moving stimuli, but women are better at discriminating between colors.

  • JackbyDev@programming.dev
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    7 days ago

    women are better at discriminating between colors.

    Misread this as saying women are better at racism lol.

  • huginn@feddit.it
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    8 days ago

    … Men are also ~20% larger than women on average. Is this count standardized by size of the person?

    • L0rdMathias@sh.itjust.works
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      8 days ago

      Does that include brain size? I mean yeah the total sum of all size comparisons is 20% larger, but like piece per piece that ain’t remotely true (see boobs for an example that defies the total average).

    • BearOfaTime@lemm.ee
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      8 days ago

      That would be an interesting metric, though I’m not sure it would really mean anything.

  • AdaA
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    8 days ago

    I’m curious about this. They say that it’s related to in utero exposure to androgens, which means it’s probably not as clear cut as XX vs XY, because intersex folk and folk with atypical hormonal exposure (such as fraternal twins of different sexes, with a shared placenta) experience different levels of exposure, and different reactions to that exposure.

      • AdaA
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        7 days ago

        Yes, absolutely. But as I said, it’s probably not as clear cut as whether you’re XX or XY, because there are other factors that can also impact hormone levels and sensitivity to hormones

  • shyguyblue@lemmy.world
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    8 days ago

    Anecdotal proof time:

    My dad’s truck.

    Me, my brother, brothers’ friend and brothers’ friends’ sister, all XY, all see a greenish gray truck.

    My mother, sister-in-law, brothers’ friends’ wife, all XX, all see a dark green truck.

    • JackFrostNCola@lemmy.world
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      7 days ago

      This reminds me of my wife and I arguing over whether my shorts were grey or brown, she asks her friends and she just says “oh those, they are taupe”. Which essentially means my wife won that argument.

    • AdaA
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      So, for XX folk, the increased colour differentiation comes from fact they carry two sets of genes that encode for colour detection, and because they don’t encode identically, each set creates a ever so slightly different perception of colour. And when you get two similar, but non identical perceptions of colour, you see more hues

      • EldritchFeminity
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        8 days ago

        I’ve heard that women have more cones in their eyes as well, which leads to a more nuanced sense of differentiation between colors.

        • atro_city@fedia.ioOP
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          7 days ago

          I would really like to see a study on that. Take a color then slowly remove the contrast and ask when the change is discernible. Take a color then slowly transition to another color and ask the same question. Maybe do that with a few hundred people of both sexes and record the differences.

          But it’ll have to take into account where people are from. In Northern countries for example, it wouldn’t surprise me if the difference between blues and whites is much more prominent than reds (snow vs not snow). Or for those living in the jungle all their lives, or those living in cities all their lives, and so on. I’m sure there’ll be obvious differences depending on origin and sex.

          • EldritchFeminity
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            7 days ago

            There’s definitely studies on it. I don’t know how they measure them, but it’s all about the number and type of cones in your eyes because there are a few different types that see different colors. This is why tigers are orange - because their prey lack the cones that see red, so the tigers look like the rest of the background foliage.

      • CrayonRosary@lemmy.world
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        8 days ago

        My two eyes see slightly different color. Noticed this years ago when looking at a florescent ceiling light with my eyes relaxed such that I was seeing a double image. The two images of the light were a slightly different color.

        I’m a dude.

    • AdaA
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      8 days ago

      Now you need to post a picture of that truck!

  • mlg@lemmy.world
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    7 days ago

    Men have greater sensitivity to fine detail and rapidly moving stimuli

    Looks at every first person shooter demographic

  • KillingTimeItself@lemmy.dbzer0.com
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    7 days ago

    ok so, here’s my theory. The obvious answer here is that this is obviously “for hunting” or something. But evolution doesn’t really work that way.

    So my take on this is that this is actually an evolutionary adaptation to the different structure of the male body, as well as it’s general abilities, and how they have been used throughout humanity. If men are generally stronger, taller, and faster runners, wouldn’t it make sense that the visual processing would be adapted to be more responsive to these use cases?

    this seems like the only realistic answer to me. Something about men must be different enough, or at the very least, have been used differently enough at some point in time for a long enough period of time, that it has to have been an evolutionary adaptation.

    • flashgnash@lemm.ee
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      7 days ago

      Not sure what your mean by it doesn’t work that way

      If men were predominantly doing the hunting, women would be more likely to choose a more successful hunter (more likely to pass on their genes if they have a better mate)

      Also in general the ones who were better at hunting and their mates would be more likely to survive long enough to have children

      • KillingTimeItself@lemmy.dbzer0.com
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        6 days ago

        it’s essentially an excessive over simplification of something that’s not perfectly accurate, that’s the problem.

        While it would apply to hunting, when you’re talking about something like visual acuity, it’s super broad in the applications that it’s useful in. Even things such as not falling over would be beneficially influenced by better visual acuity. You could argue that men just stopped falling over and dying as frequently, leading to evolutionary selection over time, but that’s probably not super accurate lol.

        • flashgnash@lemm.ee
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          6 days ago

          I would argue there that there’s a limit to how much better eyesight would affect things like that though, falling over and dying

          Using that example if someone’s vision is like an old CRT they might not see a root or something, trip over and die. If they have 1920x1080 they might see it if they have 4k they definitely see it.

          Hunting however can benefit limitlessly, the further away you can see the better you can track

          • KillingTimeItself@lemmy.dbzer0.com
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            5 days ago

            I would argue there that there’s a limit to how much better eyesight would affect things like that though, falling over and dying

            that specific example was a little bit hyperbolic, but i think there is likely a general improvement with the ability to sight vision and small discrepancies in things.

            Also you’re talking about visual clarity, this is specifically about being able to detect motion better.

            as for why this matters for shit like not falling over and dying? Well cool little story, sometimes humans like to move around. Things around us move in relation to ourselves, so it could be expected to see some benefit in that regard as well.

            • flashgnash@lemm.ee
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              5 days ago

              I’m not arguing good vision is not important for general survival, but I think hunting has a higher ceiling of usefulness for good vision than anything else humans did in that period

    • Fedizen@lemmy.world
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      I was thinking it was more to do with dancing, possibly even music. It could even be something really weird.

      Usually the way to identify if its about hunting/war or not is to find the exceptions and links: do hunters that perform really, really well have 3x the visual cortex neurons? Is it a socialization thing where doing certain tasks results in higher brain differentiation?

      There’s a lot of questions

      • Plopp@lemmy.world
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        7 days ago

        I was thinking it was more to do with dancing

        You’re thinking of Homo Groovensis, the famous hunter dancerers.

      • Shou@lemmy.world
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        7 days ago

        Women do prefer men who show attention to detail. It’s why men’s attire meant to look good, often contains buckles, buttons and pins that give it a slight touch of detail.

        • Plopp@lemmy.world
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          It’s why men’s attire meant to look good

          Oh so that’s where I fuck up.

      • KillingTimeItself@lemmy.dbzer0.com
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        hmm, that’s definitely interesting.

        Usually the way to identify if its about hunting/war or not is to find the exceptions and links: do hunters that perform really, really well have 3x the visual cortex neurons? Is it a socialization thing where doing certain tasks results in higher brain differentiation?

        yeah, this is why i think it’s more of a secondary adaptation, as opposed to something directly evolving from the needs of hunting for example. Something like this is generally broad, and generally applied, usually. So i would think the cause would as well.

        One thing that i thought of was a nightwatch position, the heightened visual acuity would be highly valuable in a low visibility environment. So maybe it’s something like co-evolution? Where females developed more accurate color perception, while males developed more accurate movement perception.

        we’re probably thinking too hard about it, and it’s probably just evolution trolling us and giving us the best of both worlds because we are in fact a socialized species. So this could stem from our social aspect, not directly, but the benefit of it in a social aspect is vastly more impactful, leading to more socialization, and further development of this adaptation.

  • edgemaster72@lemmy.world
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    8 days ago

    women are better at discriminating between colors.

    Well I’m red-green colorblind so I never stood a chance anyway. If it isn’t in a box of 8 crayons/markers, I don’t attempt to use that color’s name generally, cuz I will never pick the right shade. All the fuschias, magentas, maroons, burnt siennas, teals, cyans, etc. of the world can fuck off.

    • The Picard Maneuver@lemmy.world
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      8 days ago

      Isn’t colorblindness almost exclusively found in males too?

      Probably oversimplifying, but it’s something about the mutation being on the X chromosome, meaning women have a backup X and men don’t.

      • CyanideShotInjection@lemmy.world
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        It is possible for someone with two X chromosomes to still be colorblind, but since this gene is recessice you have to have the mutation on both chromosomes, which makes it way more rare.

      • AdaA
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        8 days ago

        You pretty much nailed it

      • chonglibloodsport@lemmy.world
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        It’s not really a backup X. In any given cell in a woman’s body, one of the X chromosomes has been inactivated into something called a Barr body. The remaining X chromosome is then the active one.

        Women carriers of the gene defect for protan (causing protanopia in males) exhibit Schmidt’s Sign, an abnormal insensitivity to long wavelengths (red light). This is due to the highly skewed L:M cone ratio caused by the defective gene.

  • monkeyman512@lemmy.world
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    8 days ago

    Does this mean the visual center is 25% larger or that the configuration of cells is different? If it is larger where are are women’s brains larger then men’s brains?

    • L0rdMathias@sh.itjust.works
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      It means there are 25% more, but neurons aren’t the only thing the brain is made of. Idk how much of a size difference, if any, this makes. Considering how sensitive lips and fingers are compared to equal sized parts of your skin in other areas, there might be a similar situation of just having a lot of space in the total structure for extra neurons. It could be a small increase in size, it could have no impact on size, more studies required.

      • monkeyman512@lemmy.world
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        8 days ago

        At the very least it makes a good exercise in questioning facts to make sure you are not coming to faulty conclusions by misunderstanding.

    • Ibaudia@lemmy.world
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      8 days ago

      You are literally charged more for insurance for being a man in the US because men are, observably and on average, worse drivers than women.

      • hasnt_seen_goonies@lemmy.world
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        8 days ago

        Yes, but to be more exact, men get in more expensive accidents, and women get into more frequent cheaper accidents. I assume it has to do more with risk taking.

        • FinishingDutch@lemmy.world
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          8 days ago

          Pretty much. Men speed more for example and drive under the influence more often. High mortality risk on those.

          Women however tend to be a bit more distracted when driving; they use their phones more often behind the wheel for example. There’s also particular situations that simply happen more to women. I.e. they go grocery shopping and are distracted by the kids in the back seat and hit another car or object in the busy parking lot.

          That’s also why innovations like backup cameras and parking sensors are great at reducing those sorts of accidents. But still: tell the wife to put the phones away if she’s driving. For everyone else’s safety too.

    • TypicalHog@lemm.ee
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      6 days ago

      9 upvotes and 18 downvote? yall are actually crazy if yall thought women were hunting even as much as men did.

      • TypicalHog@lemm.ee
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        6 days ago

        that it has only been what? There is absolutely no way women were hunting as much as men.