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The Incentives Lab
HBT-COG-0525 · Dimension COG · Cognition

Pessimism Bias

Overestimating the probability of bad outcomes.

Probability Bias·Cognitive Bias·Grade B·draft· enriching…

Scientific Definition

Overestimating the probability of bad outcomes.

Plain-English Definition

Overestimating the probability of bad outcomes.

Feynman Explanation

Every opportunity looks like a trap to a sufficiently tired team.

Core Principle

Overestimating the probability of bad outcomes.

Mechanisms

Psychological

Overestimating the probability of bad outcomes.

Behavioral Economic

Pending editorial review.

Neurological

Pending editorial review.

Evolutionary

Pending editorial review.

Sociological

Pending editorial review.

Computational

Pending editorial review.

Systems

Pending editorial review.

Inputs (Triggers)

Pending editorial review.

Outputs (Behaviors)

Pending editorial review.

Behavioral Signature

Every opportunity looks like a trap to a sufficiently tired team.

Examples

Everyday
  • Killing a real opportunity because the worst case feels more real than the base case.
Modern (Organizational)
  • Risk-averse cultures starve their own pipelines.
Historical

Pending editorial review.

Famous Experiments

Pending editorial review.

Design Principles

  • Forced upside analysis. Quantify the cost of not acting.

Measurement Approaches

Pending editorial review.

Evidence

Evidence Grade
B (A strongest → E speculative)
Replication
★★★☆☆
Intervention Confidence
3 / 5
Consensus
Pending editorial review (HBT v1.0 auto-seed).
Limitations
Pending editorial review (HBT v1.0 auto-seed).
Open Research Questions

Pending editorial review.

Primary References

Pending editorial review.

Signature Section

The Perverse Incentive Lens™

How this behavior is exploited — and how to redesign around it.

Exploitation
AI adoption frozen by fear of edge cases at the cost of the median case.
Amplifying Incentives
Risk-averse cultures starve their own pipelines.
Org Failure Modes
Risk-averse cultures starve their own pipelines.
Societal Failure Modes
Pending editorial review (HBT v1.0 auto-seed).
Ethical Considerations
Pending editorial review (HBT v1.0 auto-seed).
Redesign Strategies
Forced upside analysis. Quantify the cost of not acting.
Diagnostic Questions
  • Forced upside analysis. Quantify the cost of not acting.
Warning Signs

Pending editorial review.

Red Flags

Pending editorial review.

Intervention Playbook
Individual
Forced upside analysis. Quantify the cost of not acting.
Team
Pending editorial review (HBT v1.0 auto-seed).
Organization
Pending editorial review (HBT v1.0 auto-seed).
Policy
Pending editorial review (HBT v1.0 auto-seed).
AI Implications
Detection
AI adoption frozen by fear of edge cases at the cost of the median case.
Measurement
Pending editorial review (HBT v1.0 auto-seed).
Mitigation
Pending editorial review (HBT v1.0 auto-seed).
Responsible Use
Pending editorial review (HBT v1.0 auto-seed).

Interactive Mini Network

Click any neighbor to re-center the graph and follow the threads of connection.

HBT-COG-0525 · COG
Pessimism Bias
PBAAAmbiguity AversionBRBase Rate NeglectCFConjunction FallacyGFGambler's FallacyHFHot-Hand FallacyOBOptimism BiasPIPessimism in Forecas…PFPlanning FallacyZBZero-Risk BiasABAction Bias

Knowledge Graph Neighbors

Version History

v1.1.0 · 2026-06-28Initial auto-seed from corpus.