"A bat and a ball cost $1.10 in total. The bat costs $1.00 more than the ball. How much does the ball cost?" "Performance on [this question] has been shown to correlate with intertemporal choice, risky choice, moral reasoning, strategic behavior, and belief in god."
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Most people with a college degree – and nearly everyone without one – answers 10 cents. 13% answer 10 cents even after being given the following message: "HINT: 10 cents is not the answer."
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One experiment phrased it this way: A bat and a ball cost $1.10 in total. The bat costs 1.00 more than the ball. How much does the ball cost? $____ How much does the bat cost? $____ Is your "bat" answer $1.00 more than your "ball" answer? Yes OR No
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Of the people who answered $1.00 and $0.10 ... 80% of them then answered "Yes".
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The authors of the paper I'm reading suggest that the problem works somewhat like an optical illusion. There's an answer which is intuitive, but wrong. Once the mind "sees" that answer, it then reshapes the QUESTION to match the arrived-at answer, and is STICKY about it.
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Replying to @random_eddie
I'm enough of a nerd that I immediately got $0.05 and $1.05 and kept staring at it trying to figure out what the trick was
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look, I'm really sorry how !@#-ed up this whole thing got
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