Noisy decisions

Nobel memorial prize winner Daniel Kahneman is one of the world’s most famous psychologists, known particularly for his work identifying the role of cognitive bias in everyday decision making. He talks to Tim Harford about his latest book, Noise: A Flaw in Human Judgement, in which he outlines how a multitude of often irrelevant factors influence important decisions, whether in job interviews, the courtroom or workplaces generally - and what we can do about it.