Noise: A Flaw in Human Judgment

Noise: A Flaw in Human Judgment by Daniel Kahneman examines the inconsistency and variability that plague decision-making across professions - from medicine and law to business and government. Kahneman, the Nobel Prize-winning psychologist, argues that while bias receives considerable attention, noise (the scatter in individual judgments) causes equal harm and often goes undetected. The book explores how subjective decisions diverge unpredictably, even when made by equally qualified experts applying similar standards.

Drawing on decades of research and real-world examples, Kahneman demonstrates noise in action: judges imposing wildly different sentences for identical crimes, radiologists reaching conflicting diagnoses from the same scans, hiring committees selecting different candidates from the same pool. He traces the psychological mechanisms behind these inconsistencies and proposes practical methods to reduce noise through structured decision processes, checklists, and organizational practices. The work extends concepts from his earlier bestseller Thinking, Fast and Slow, offering concrete tools for anyone responsible for high-stakes judgments.

This is essential reading for professionals in healthcare, finance, law, and management who want to understand how judgment errors accumulate and how to build more reliable systems.

• Explores the hidden costs of decision inconsistency across professions
• Distinguishes between bias (systematic error) and noise (random variation)
• Includes case studies from criminal justice, insurance, and corporate hiring
• Offers actionable frameworks to reduce judgment variability
• Hardcover; explores behavioral economics and organizational psychology

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