Summary
This book's central argument is that variability in judgments that should be identical, termed "noise," has detrimental effects across numerous fields, including medicine, law, and economic forecasting. Authors Daniel Kahneman, Olivier Sibony, and Cass R. Sunstein argue that individuals and organizations are largely unaware of this noise and neglect it, despite its pervasive presence wherever judgment is exercised. They demonstrate how noise manifests through different doctors giving different diagnoses to identical patients, judges imposing varied sentences for the same crime, or interviewers making disparate decisions about similar job applicants. The same decision-maker can also produce different judgments depending on the time of day or week.
The book explains why humans are susceptible to noise in judgment and proposes simple remedies to reduce both noise and bias, leading to better decisions. By understanding the causes and consequences of noise, readers can learn to mitigate its impact on judgments in various professional and personal contexts, leading to more consistent and accurate outcomes.
Key concepts
- Noise — Variability in judgments that should be identical.
- Bias — A related flaw in human judgment that can be reduced alongside noise.
- Judgment — The core human activity where noise and bias occur.
From the book
Description: NEW YORK TIMES BESTSELLER From the Nobel Prize-winning author of Thinking, Fast and Slow and the coauthor of Nudge, a revolutionary exploration of why people make bad judgments and how to make better ones—"a tour de force” (New York Times). Imagine that two doctors in the same city give different diagnoses to identical patients—or that two judges in the same courthouse give markedly different sentences to people who have committed the same crime. Suppose that different interviewers at the same firm make different decisions about indistinguishable job applicants—or that when a company is handling customer complaints, the resolution depends on who happens to answer the phone. Now imagine that the same doctor, the same judge, the same interviewer, or the same customer service…