Idea 8: Feedback

When imparting a message of any kind to others, some of the energy you expend comes back to you in the form of feedback. You tell a joke and the audience laughs; you perform a song and the audience claps. That laughter and applause are forms of feedback.

The actual word feedback, now so common in everyday use, was coined by Norbert Wiener, an American applied mathematician and founder of cybernetics, in an influential book entitled Cybernetics: Or Control and Communication in the Animal and the Machine (1946).

In this seminal book Wiener compared communication to a system that loops back on itself: the parts are linked together in a cycle of activity like a child’s electrical train set. Information does not just pass downwards ...

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