Khizooology monster logoKhizooology

Noise

Daniel Kahneman, Olivier Sibony & Cass Sunstein · 2021

Consistency is part of decision quality, not merely neatness.

Big Idea

Kahneman, Sibony, and Sunstein distinguish unwanted variation in judgments from systematic bias.

Unwanted variation

Similar cases can receive different judgments even when relevant facts are alike.

Bias versus noise

Bias shifts judgments in a direction; noise scatters judgments unpredictably.

Noise audits

Comparing independent assessments can reveal variation that an organization did not notice.

Decision hygiene

Structured criteria and independent judgments can reduce avoidable inconsistency.

Human consequences

In hiring, justice, or medicine, inconsistent assessments can carry serious costs.

Notooo Take

Compare independent ratings before discussing a shared conclusion.

One Thing to Keep

Consistency is part of decision quality, not merely neatness.

NOTOOO · KHIZOOOLOGYOne Book. One Page.khizooology.com

Why this book matters

Kahneman, Sibony, and Sunstein distinguish unwanted variation in judgments from systematic bias.

About this Notooo

This note brings together five short sections: Unwanted variation; Bias versus noise; Noise audits; Decision hygiene; Human consequences. It offers an original source-based interpretation, not a full-book recap or Khizar’s personal reading account.

A khizooo-curated one-page synthesis created with AI-assisted research. It captures useful ideas, not the complete book.
Notooo is not a replacement for reading the original book.