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Definition 1

Explicit or implicit agreement, with or without consequences, to the acceptance of a future behavioral change.

Source: Behavioral Science Lab, 2017

Definition 2

Commitments (see also precommitment) are often used as a tool to counteract people’s lack of willpower and to achieve behavior change, such as in the areas of dieting or saving. The greater the cost of breaking a commitment, the more effective it is (Dolan et al., 2010).

Source: Behavioral Economics

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