Nature! Nurture! Another distinction that sounds like it might represent something Fundamental And Real and Unambiguous. Supplanted Calvin’s distinction between total depravity vs penance in the people-blaming niche.
I do not have much interest or expertise in this area, but this placeholder will collect a couple of interesting links to refer to next time I get caught up in some aggravating vague semantic argument in this area.
See also other quirky taxonomies:
- free will/determinism
- Gryffindor/Slytherin/the other ones
- sugar, spice, all things nice/slugs, snails, puppy dogs’ tails
- Doctor Who/Daleks
Unlike Doctor who/Daleks, this one is used for actual decision making and public debate outside of Tumblr, so it bears looking in to.
Which is more important, nature or nurture?
At risk of weak manning I think we can rule out the usefulness of this question as it stands, which I presume few actual researchers ask. We need to refine it to get to an answerable question. That should go without saying, you would have thought, but pub conversation suggests not. To recycle a common analogy, imagine a computer science where the central questions were ones like: “can do word processing on my laptop because of hardware or because of software?”. This kind of muddy thinking will have us trying to discern the contribution of “hardware factors” versus “software factors” to word processing via a variance decomposition. Not that even variance decompositions happen in the pub conversations usually. Anyway, you get the drift. To say anything useful we must make sure it is clear what we are getting at, which seems to be challenging in this area for some reason. (Probably: because this politically charged topic that looks simple enough to have an opinion on.)
The classic heritability score.
Spoiler: Heritability is a variance decomposition over two factors. This is a reasonably blunt instrument with which we can bash results out of meagre data and computation. A lot of, e.g. the twin studies are constrained by lack of data, because of a lack of twins. This might change with advances in genomics. As with any research that comes from observational studies, one should be suspicious reading research that doesn’t at the bare minimum extend their method to a causal DAG.
Homework questions for classic heritability scores:
- How heritable is English vocabulary size?
- How heritable is bank balance?
- How heritable is a bachelors degree in evolutionary psychology?
Ozymandias, Shared environment effects are real makes some interesting points about how we discuss shared environment.
Believing in zero role for shared environment also fails to pass the sniff test. Lots of people, I think, will agree that whether or not you talk to your baby might not have any long-term consequences. But the “zero role for shared environment” position requires yourself to commit to the position that all of the following have either zero correlation between siblings or no effect on children’s psychology whatsoever:
- Lead poisoning.
- All other forms of air and water pollution.
- Prenatal nutrition.
- Drinking during pregnancy. […]
Scott Alexander parodies The Gattaca Trilogy
Based on this review, I would like to read Anne Innis Dagg’s “Love of Shopping” is Not a Gene, for some evolutionary psychology amusement.
My favourite Evolutionary Psychology slapfight, because it is dead earnest, is the In Our Time Episode, where Melvyn Bragg is in magnificent form, and scientists rambunctiously talking across each other in a microcosm of evolutionary psychology discourse more broadly.