An anonymous reader writes "Researchers are debating the ethics of so-called 'nudging technologies' — ambient technology systems designed to shape or influence human behavior, such as an installation which encourages people to take the stairs rather than the lift by using hanging colored balls to represent stairs vs lift usage. A researcher on the project said: 'Most people, when we asked them, "Do you think this has changed your behavior," they said no. But the data showed that it had actually done that.'"
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