04/09/2012 12:55 pm ET

The Chocolate-and-Radish Experiment That Birthed The Modern Conception Of Willpower

In the psychology world, the key finding of this seemingly silly study was a breakthrough: self-control was a general strength that was used across different sorts of tasks -- and it could be depleted. This proved that self-regulation is not a skill to be mastered or a rote function that can be performed with little consequence.

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