People who were told they would get 0.10 euro to 1 euro for each correct answer on an IQ test scored up to 6% higher than those who didn’t get such rewards, suggesting that IQ numbers are a matter of motivation as well as intelligence, says a team led by Lex Borghans of Maastricht University in the Netherlands. The rewards prompted participants to invest more time on the questions, leading to better performance. The amount of money didn’t matter as much as the mere presence of an incentive.

(Source: HBR Blog Network)

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