Cognitive Biases in Personal Judgment Cheat Sheet

Updated 2026-05-28

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Cognitive biases are systematic patterns of deviation from norm or rationality in judgment, originating from the brain's need to simplify information processing. First cataloged comprehensively by Daniel Kahneman and Amos Tversky in the 1970s, these mental shortcuts affect personal decisions, professional judgments, and social interactions. While biases evolved to help humans make quick decisions under uncertainty, they often lead to predictable errors in thinking—from overestimating our abilities to misjudging probabilities. Understanding these biases is the first step toward debiasing: once you recognize that your judgment naturally skews in specific directions, you can implement strategies to correct course before committing to flawed decisions.

What This Cheat Sheet Covers

This topic spans 11 focused tables and 88 indexed concepts. Below is a complete table-by-table outline of this topic, spanning foundational concepts through advanced details.

Table 1: Memory and Information Processing BiasesTable 2: Self-Assessment and Confidence BiasesTable 3: Attribution and Social Judgment BiasesTable 4: Group and Social Influence BiasesTable 5: Probability and Risk Judgment BiasesTable 6: Loss, Ownership, and Economic BiasesTable 7: Framing and Presentation BiasesTable 8: Emotional and Affective BiasesTable 9: Debiasing Strategies and TechniquesTable 10: Metacognitive and Self-Monitoring PracticesTable 11: Attention, Social Perception, and Cognitive Load Biases

Table 1: Memory and Information Processing Biases

Memory shapes and distorts more than it records—our brains actively reconstruct the past and filter present information through existing beliefs. These biases explain why eyewitness testimony is unreliable, why confirming facts stick in memory better than disconfirming ones, and why the internet age has subtly reshaped what we even bother to remember.

Bias	Example	Description
Confirmation bias	Searching only for articles that support your political view	Tendency to favor information that confirms preexisting beliefs while ignoring or dismissing contradictory evidence.
Availability heuristic	Overestimating plane crash risk after seeing news coverage	Judging likelihood of events based on how easily examples come to mind rather than actual statistical probability.
Anchoring bias	First salary offer of $60K influences all counteroffers	Relying too heavily on the first piece of information encountered when making decisions.
Illusory truth effect	Believing vitamin C prevents colds after hearing it repeated	• Tendency to judge repeated statements as true regardless of actual accuracy • repetition creates a feeling of familiarity mistaken for truth
Recency bias	Employee evaluation focuses on last month only	Tendency to remember and overweight the most recent information when making judgments.
Hindsight bias	"I knew it all along" after election results	Believing past events were more predictable than they actually were after outcomes are known.

Table 1: Memory and Information Processing Biases

Bias	Example	Description
Confirmation bias	Searching only for articles that support your political view	Tendency to favor information that confirms preexisting beliefs while ignoring or dismissing contradictory evidence.
Availability heuristic	Overestimating plane crash risk after seeing news coverage	Judging likelihood of events based on how easily examples come to mind rather than actual statistical probability.
Anchoring bias	First salary offer of $60K influences all counteroffers	Relying too heavily on the first piece of information encountered when making decisions.
Illusory truth effect	Believing vitamin C prevents colds after hearing it repeated	• Tendency to judge repeated statements as true regardless of actual accuracy • repetition creates a feeling of familiarity mistaken for truth
Recency bias	Employee evaluation focuses on last month only	Tendency to remember and overweight the most recent information when making judgments.
Hindsight bias	"I knew it all along" after election results	Believing past events were more predictable than they actually were after outcomes are known.