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NicoleBarbaro's profile
Nicole Barbaro
Nicole Barbaro
Nicole Barbaro
@NicoleBarbaro

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Nicole Barbaro

@NicoleBarbaro

a psychologist who should have been a biologist — PhD student at @OaklandU with @TKShackelford — evolution + development + behavioral genetics

Michigan, USA
nicolebarbaro.com
Joined April 2017

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    1. Rolf Degen‏ @DegenRolf Jan 23

      Contrary to predictions, thoughts about partner infidelity didn't make men produce higher quality ejaculate. I find the whole human sperm competition approach spermythology. https://www.researchgate.net/profile/Todd_Shackelford/publication/322527281_Do_Men_Produce_Higher-Quality_Ejaculates_When_Primed_with_Thoughts_of_Partner_Infidelity/links/5a5f6f39458515b437796a94/Do-Men-Produce-Higher-Quality-Ejaculates-When-Primed-with-Thoughts-of-Partner-Infidelity.pdf …pic.twitter.com/G5P8JIBVrZ

      9 replies 19 retweets 51 likes
    2. Bugman Zogman, Per Capita Respecter  ❤️‏ @BrosephGerbils Jan 23
      Replying to @DegenRolf

      But men still produce a greater volume of ejaculate (=more sperm) in greater-competition scenarios? And the quality of that sperm isn't *less* than in a lower-competition scenario? That's well supported? If so, then this line of study wouldn't yet be "spermythology."

      1 reply 0 retweets 1 like
    3. Rolf Degen‏ @DegenRolf Jan 23
      Replying to @BrosephGerbils

      The literature on sperm competition tends to ignore a lot of disconfirming evidence, for example this http://webhost.lclark.edu/clifton/behav/human%20sperm%20competition.pdf … And I could go on and on...

      1 reply 0 retweets 1 like
    4. Nicole Barbaro‏ @NicoleBarbaro Jan 23
      Replying to @DegenRolf

      But also, see http://toddkshackelford.com/downloads/Baker-Shackelford-AJPA.pdf … … supporting an evolutionary history of sperm comp in Hominoidea

      1 reply 1 retweet 0 likes
    5. rust cohle‏ @meistrephilipos Jan 23
      Replying to @NicoleBarbaro @DegenRolf

      How much evidence confirm and how much evidence disconfirm sperm competition? This is important to know 'cause we could cite evidence from two sides forever.

      2 replies 0 retweets 0 likes
    6. Rolf Degen‏ @DegenRolf Jan 23
      Replying to @meistrephilipos @NicoleBarbaro

      Rolf Degen Retweeted

      For starters, it would be nice if the supporters of human sperm competition would seriously address the fundamental problems with the theory, as summed up here: https://twitter.com/YeyoZa/status/955799576405037058 …

      Rolf Degen added,

      This Tweet is unavailable.
      1 reply 0 retweets 1 like
    7. Nicole Barbaro‏ @NicoleBarbaro Jan 23
      Replying to @DegenRolf @meistrephilipos

      Current rates of cuckoldy or semen quality do not *necessarily* nullify a significant ancestral history of sperm competition in human lineage. Questions of origins/significant selection pressures are different than questions of maintenance/current utility

      3 replies 0 retweets 2 likes
    8. rust cohle‏ @meistrephilipos Jan 23
      Replying to @NicoleBarbaro @DegenRolf

      Is it possible that any current factor interference in sperm production to the point of falsifying evidence on sperm competition q negative be corroborated in traditional societies? By the way, theres are evidence from tradicional societies?

      1 reply 0 retweets 0 likes
    9. Nicole Barbaro‏ @NicoleBarbaro Jan 23
      Replying to @meistrephilipos @DegenRolf

      Yes, general health behaviors (e.g., smoking, prolonged heat on genital region-from laptops, for instance) can decrease semen quality, which *may* cause interference. To my knowledge, I'm not aware of experimental evidence from traditional societies--would definitely be helpful!

      1 reply 0 retweets 1 like
    10. rust cohle‏ @meistrephilipos Jan 23
      Replying to @NicoleBarbaro @DegenRolf

      Oh! Sure! I didn't think about this. But...Not even correlational evidence?

      1 reply 0 retweets 0 likes
      Nicole Barbaro‏ @NicoleBarbaro Jan 23
      Replying to @meistrephilipos @DegenRolf

      Not sure off the top of my head, honestly, But here are two reviews of human sperm comp lit that may be of interest: http://toddkshackelford.com/downloads/Pham-Shackelford-ABC-2014.pdf … http://toddkshackelford.com/downloads/Goetz-et-al-ARSR-2007.pdf …

      7:21 AM - 23 Jan 2018
      • 1 Like
      • rust cohle
      1 reply 0 retweets 1 like
        1. New conversation
        2. rust cohle‏ @meistrephilipos Jan 23
          Replying to @NicoleBarbaro @DegenRolf

          So, it means that there are evidence about both sides of debate, but reviews seem to corroborate sperm competition. Is it possible to argue in that way?

          1 reply 0 retweets 1 like
        3. Nicole Barbaro‏ @NicoleBarbaro Jan 23
          Replying to @meistrephilipos @DegenRolf

          Yes because much of the research on human sperm comp has been primarily correlational. Aside from original Baker&Bellis studies, our recent study, & some work out of Leigh Simmons' lab, there is little experimental work. Without experiments, firm conclusions are difficult to make

          1 reply 0 retweets 1 like
        4. rust cohle‏ @meistrephilipos Jan 23
          Replying to @NicoleBarbaro @DegenRolf

          To the extent that sperm competition is a ultimate hypothesis about human behavior, sometimes I wonder about the explanatory power between correlational and experimental evidence. I dont know but sometimes seems that experimental design is greater in proximal questions.🤔

          0 replies 0 retweets 1 like
        5. End of conversation

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