Nudge theory: the psychology and ethics of persuasion - Science Weekly podcast

This week, Ian Sample explores the psychology behind 'nudging', its usage by governments, and some of the ethical quandaries involved

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Every day, each one of us is "nudged" by external factors and actors to change how we behave. Whether it's the weather forecast, an advert on the train, or advice from a friend, we are all influenced by nudges. But what is a nudge? What is the human psychology behind their effectiveness? And when does a nudge become something more sinister - such as coercion or manipulation?