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Talking Heads review: Cunning tale of how conversation creates worlds

The way conversation shapes our worlds and holds them together is cunningly teased apart by Shane O'Mara, a professor of experimental brain research

By Tom Tierney

2 August 2023

New Scientist. Science news and long reads from expert journalists, covering developments in science, technology, health and the environment on the website and the magazine.

Conversation isn’t just vital to individuals, but to societies as well

Gary Burchell/Digital Vision/Getty Images

Talking Heads
Shane O’Mara (Bodley Head)

HUMAN conversation is highly structured, and those structures are often consistent across languages. In face-to-face conversation, we tend to take turns speaking for about 2 seconds, with a gap of about one-fifth of a second between exchanges. This gap is so short that it is comparable to the response time to a starting pistol, and it is only possible because we anticipate what people are going to say based on just their first few words.

Indeed, our use…

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