Daniel Kahneman on 'noise' – the flaw in human judgement harder to detect than cognitive bias

By Ben Newell, Professor of Cognitive Psychology, UNSW

Imagine two doctors presented with identical information about the same patient giving very different diagnoses. Now imagine the reason for the difference is because the doctors have made their diagnosis in the morning or afternoon, or at the beginning or the end of the week.

This is “noise” – the reason human judgements that should be identical vary – which Daniel Kahneman, one of the world’s best-known psychologists and winner of the 2002 Nobel Prize in Economics, tackles in his latest book, Noise:…

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