Twitter Digest: 2011-12-22

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  1. Interesting regarding the article about natural selection and anxiety / mood disorders. This caught your attention, why? Do people with ADD or ADHD have more problems with anxiety / mood? Do you have ADD or ADHD?

  2. unfavorable odds says:

    Off-the-wall thought on "natural selection". Is mood disorder a global phenomenon or developed country, or North American specific? There is a huge tendency to do human behavior tests only on single-country participants and then ascribe the condition to all of humanity, particularly in behavioral economics. Maybe they should be investigating evolutionary sociology.

    The other off-the-wall point is the treatment for infertility. Infertile couples used to not have babies. Was there a "natural" reason for the infertility? Is the medical intervention now disrupting the "natural selection"? Causing someone who is infertile to have a baby doesn't seem to define natural selection.

    Just to be clear, I am not against scientists helping infertile couples, just as I am not against scientists helping humans fly. But I wonder if anyone has done a long-term study comparing kids whose parents used fertility treatments compared to those who didn't … or even comparing grandparents or great-grandparents. Given the time horizon of evolutionary biology, it might be a generation or two before anyone can tell a significant difference.