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Encyclopedia of Nutritional Psychology

Nudge Theory

Evidence-informed definition Updated June 17, 2025 How to cite this entry

A theory of behavior change was proposed in 2009 by Richard Thaler and Cass Sunstein. It applies the principles of behavioral economics to influence human behavior and proposes that every environment has a “choice architecture” that shapes human behavior. This architecture encompasses all external forces that may subtly influence one’s decision in one direction or another. The basic element of this choice architecture is called a nudge.

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Written by Lyanna Tran
Reviewed by CNP Encyclopedia Editorial Board
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Lyanna Tran. (2025). Nudge Theory. In Encyclopedia of Nutritional Psychology. The Center for Nutritional Psychology.

https://www.nutritional-psychology.org/encyclopedia/nudge-theory/
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