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Torello comments on Open thread, Nov. 24 - Nov. 30, 2014 - Less Wrong Discussion
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I agree that small physical differences can be very consequential--wouldn't small mental differences be similarly consequential?
http://www.radiolab.org/story/91618-lying-to-ourselves/
This radiolab episode discusses how swimmers who engage in more self-deception win more frequently, controlling for other factors (i.e., self-deceivers on a division 3, 2, and 1 teams are more likely to beat their opponents, so at different levels of physical skill their mentality is predictive).
I'm not sure what you're getting at here--that the victory of a particular person is attributable to noise because the margin of error is small?
Great points.
In Phelps' case, I think he is physically superior—though perhaps only slightly—compared to the competition. Same with Usain Bolt.
I'd agree confidence, even to the extent it is self-deception, can make a significant difference when it comes to sports performance. However, when an athlete—like Phelps or Bolt—routinely wins over the course of several races spanning years, I think physical capability differences are the main reason.
In team sports, or really any sport that requires more than just straight line speed, I think psychological difference are very important. But swimming and sprinting are largely physical contests. Unless you have problems with false starts, I'm not seeing where the mental edge figures in.
(Obviously longer races that require endurance and pacing considerations are more prone to psychological influence.)