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SteveStuWill's profile
Steve Stewart-Williams
Steve Stewart-Williams
Steve Stewart-Williams
@SteveStuWill

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Steve Stewart-Williams

@SteveStuWill

Psychology, evolution, nature/nurture, sex differences, etc. My second book, The Ape That Understood the Universe, hit the shelves in 2018...

United Kingdom
stevestewartwilliams.com
Joined April 2009

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    Steve Stewart-Williams‏ @SteveStuWill 16 Jul 2018

    Natural Selection in Modern Humans (UK; N ≈ 500,000) http://www.pnas.org/content/early/2017/12/12/1707227114.abstract … Traits currently favoured by selection: Younger age at first birth in ♀️; higher BMI in ♂️ Traits being selected against: Intelligence; educational achievement (!) Figure: https://www.economist.com/news/science-and-technology/21732803-it-does-however-no-longer-seem-favour-braininess-data-half-million …pic.twitter.com/YexhkkqyUF

    6:39 PM - 16 Jul 2018
    • 191 Retweets
    • 376 Likes
    • L'espanyista Double V Quotron Lucas Barron Morsker Menelaus Masanori Takezawa LogicPrevails? Diogenes The Cynic (Διογένης ὁ Κυνικός)
    26 replies 191 retweets 376 likes
      1. New conversation
      2. Tom Johnstone‏ @itjohnstone 16 Jul 2018
        Replying to @SteveStuWill @RemiGau

        Correlations as high as 0.6??? Sounds extremely unlikely to me.

        2 replies 0 retweets 3 likes
      3. Tom Johnstone‏ @itjohnstone 16 Jul 2018
        Replying to @itjohnstone @SteveStuWill @RemiGau

        When I see correlations this high between indices such as these, I immediately think of inflation through multiple testing, or collinearity. @lakens @david_colquhoun thoughts?

        1 reply 0 retweets 5 likes
      4. Remi Gau‏ @RemiGau 16 Jul 2018
        Replying to @itjohnstone @SteveStuWill and

        Not sure it should be that surprising. The earlier you start having kids, the more kids you can have, no?

        1 reply 0 retweets 8 likes
      5. Remi Gau‏ @RemiGau 17 Jul 2018
        Replying to @RemiGau @itjohnstone and

        Real question. I really have no clue about this beyond high school knowledge about evolutionary biology and my gut feelings.

        1 reply 0 retweets 0 likes
      6. Tom Johnstone‏ @itjohnstone 17 Jul 2018
        Replying to @RemiGau @SteveStuWill and

        It's the other correlations as well. Around 0.25-0.3 just seems way too high an association for those variables.

        2 replies 0 retweets 1 like
      7. Remi Gau‏ @RemiGau 17 Jul 2018
        Replying to @itjohnstone @SteveStuWill and

        Ha. I am with you there and that makes me rethink my gut feeling for the other correlation.

        0 replies 0 retweets 1 like
      8. End of conversation
      1. Study your math! Key to the universe!‏ @JBlevins0 17 Jul 2018
        Replying to @SteveStuWill

        Idiocracy vindicatuspic.twitter.com/82Z4cIgbjT

        0 replies 0 retweets 9 likes
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      1. New conversation
      2. DKlondt‏ @dklndt 16 Jul 2018
        Replying to @SteveStuWill

        Actually, as per the graph, all metrics that relate to larger body size are selected in *both* males and females - it's just that the selection is stronger it in males.

        1 reply 0 retweets 4 likes
      3. Molina Smidsax‏ @MolinaSmidsax 16 Jul 2018
        Replying to @dklndt @SteveStuWill

        Is that higher BMI in muscle, or fat? Also, it's damn hard to find a guy who's not fat, so is that choice, or just tough luck?

        1 reply 0 retweets 4 likes
      4. Stian Pedersen‏ @stianchrister 17 Jul 2018
        Replying to @MolinaSmidsax @dklndt @SteveStuWill

        BMI doesn't care if you're jacked or fat, so it's both. It's not exactly the smartest measure, honestly.

        2 replies 0 retweets 1 like
      5. Apophenia and Augustine‏ @AugustineFacts 17 Jul 2018
        Replying to @stianchrister @MolinaSmidsax and

        Yup. The chart mitigates this problem by also including body fat percentage and hip to waist ratio.

        1 reply 0 retweets 0 likes
      6. Molina Smidsax‏ @MolinaSmidsax 17 Jul 2018
        Replying to @AugustineFacts @stianchrister and

        Low, or high, body fat percentage? High in women and low in men, is simultaneously assumed, or? What hip to waist ratio? Men with an hourglass figure are selected? Ok, I could click on the article, but it's the Economist 😂

        0 replies 0 retweets 0 likes
      7. End of conversation
      1. New conversation
      2. victorymonk‏ @victorymonk 16 Jul 2018
        Replying to @SteveStuWill @M_Methuselah

        If I read it correctly younger age at first birth goes against reproductive success. It's in negative. The positive things for women are Waist-hip ratio and Age at first period. But not age at first birth.

        1 reply 0 retweets 2 likes
      3. Milo Info‏ @MiloWear1A 16 Jul 2018
        Replying to @victorymonk @SteveStuWill @M_Methuselah

        Nope. You’re reading it wrong. The older a woman is at birth of her first child, the fewer children she will have.

        1 reply 0 retweets 3 likes
      4. victorymonk‏ @victorymonk 17 Jul 2018
        Replying to @MiloWear1A @SteveStuWill @M_Methuselah

        Got it. Thanks.

        0 replies 0 retweets 0 likes
      5. End of conversation
      1. Jesrad Seraph‏ @seraph_jesrad 22 Jul 2018
        Replying to @SteveStuWill @CainHeleverok

        BMI is not inherited genetically, and the demographic transition is still ongoing.

        0 replies 1 retweet 1 like
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      1. Tom Creo‏ @tomfcreo 16 Jul 2018
        Replying to @SteveStuWill

        Thanks to the modern day eugenics brought to us by the welfare state

        0 replies 0 retweets 3 likes
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      1. New conversation
      2.  📈atha 📈iel  📊ood 📊ard‏ @NathanielRaley 17 Jul 2018
        Replying to @SteveStuWill

        On a related note, happy 10-year anniversary to my favorite film!pic.twitter.com/Nmm1pyTqXL

        1 reply 0 retweets 5 likes
      3. 1 more reply

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