Not quite the same — I think Goolsbee’s 10 bonus points is much closer to that. The technical term for the 2 stamps to start you off is goal gradient effect (the goal looks closer when you’ve done 20% of 100 than when you have done 0% of 80); this is numerical illusion, in that 100 (out of 137) looks better than 70 (out of 100). It’s the number 100 that does it.

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Accidental behavioural economist in search of wisdom. Uses insights from (behavioural) economics in organization development. On Twitter as @koenfucius

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