Anchoring effect demo
Anchoring is the pull a number you've just seen has on your next estimate, even when you know it's random: you start from it and stop adjusting too soon. This two-question demo tries it on your own guess. It's a demonstration, not a study, and nothing you enter is stored.
Spin for a random number, then answer two questions about the share of United Nations member countries that are in Africa.
Worked example
· after the demo
In the 1974 study, people watched a wheel of fortune stop on 10 or 65, said whether the share of United Nations member countries that are in Africa was higher or lower, then gave their own estimate.
- People who saw 10 gave a median estimate of 25%.
- People who saw 65 gave a median estimate of 45%.
- Both groups knew the wheel was chance. The only thing that differed was the number.
A random number moved the typical answer by 20 points. Today the real share is 28% (54 of 193 members).
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