aka "much apparent incompetence is actually covert resistance to the unwelcome demands of authorities."
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IQ test scores rise by 10 points when you give test-takers incentives. For people with <100 IQs, the average effect on IQ is 15 points. https://www.pnas.org/content/pnas/108/19/7716.full.pdf …
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Replying to @ArtirKel @s_r_constantin
same reaction. I was expecting this to be tested directly, but instead it’s a meta analysis (and one that looks pretty noisy?) plus a weird experiment where they asked people to watch 15m video of people taking tests and rate how motivated they seemed
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a friend also passes along two studies with more straightforward designs finding no effect: https://www.ncbi.nlm.nih.gov/pubmed/29427313 and https://www.ncbi.nlm.nih.gov/pubmed/30516088
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Plotting the effect sizes and standard errors from Duckworth's meta-analysis gives more reasons for skepticism. The effect is largely due to the three large outlier studies indicated in red. All 3 were authored by Stephen Breuning: https://www.latimes.com/archives/la-xpm-1988-09-20-mn-2318-story.html … (Graph credit:
@RCAFDM)pic.twitter.com/NGasgEwfiK
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Replying to @pnin1957 @browserdotsys and
> ... we excluded the three samples with raw effect sizes greater than g = 2.00 ?
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Replying to @simpolism @browserdotsys and
That's two of Breuning's studies plus that tiny study in the upper right corner of the graph. IIRC, the effect is non-significant (and at any rate smaller) if you exclude all three of Breuning's studies.
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Replying to @pnin1957 @simpolism and
An effect size of ~2 is pretty hard to believe on its face IMO (even if this guy hadn't been convicted of actual fraud)
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data is here if anyone wants to redo the analysis http://www.pnas.org/lookup/suppl/doi:10.1073/pnas.1018601108/-/DCSupplemental/sd01.xls …
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Yikes! Thanks for checking this out!
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