Contagion Bias is avoiding contact with people or things perceived as 'contaminated'. It sits in the Cognition dimension (COG) of the Human Behavior Taxonomy™ as element HBT-COG-0183, within the Social family. The core principle: avoiding contact with people or things perceived as 'contaminated'. In incentive terms, it matters because it changes the payoff people perceive before they choose — which means it can be designed for, or exploited.
Scientific Definition
Avoiding contact with people or things perceived as 'contaminated'.
Plain-English Definition
Avoiding contact with people or things perceived as 'contaminated'.
Feynman Explanation
Bad luck, like bad news, is treated as contagious.
Core Principle
Avoiding contact with people or things perceived as 'contaminated'.
Mechanisms
Pending editorial review.
Avoiding contact with people or things perceived as 'contaminated'.
Pending editorial review.
Pending editorial review.
Pending editorial review.
Pending editorial review.
Association-based avoidance blocks good opportunities.
Inputs (Triggers)
Pending editorial review.
Outputs (Behaviors)
Pending editorial review.
Behavioral Signature
Bad luck, like bad news, is treated as contagious.
Examples
- A team avoids a project because a failed leader once touched it.
- Association-based avoidance blocks good opportunities.
Pending editorial review.
Original analysis from The Incentives Lab — how this element behaves inside real payoff structures.
Why this element matters to incentive design
Most organizations meet this element as a personnel problem. It is not one. The mechanism underneath it is straightforward: avoiding contact with people or things perceived as 'contaminated'. You can recognize it in the field by its signature: bad luck, like bad news, is treated as contagious. Every element in the Cognition dimension changes the perceived payoff of an action before the action happens, which is exactly where incentive design has leverage.
How it gets exploited
Left undesigned, association-based avoidance blocks good opportunities. It is amplified whenever association-based avoidance blocks good opportunities. Inside organizations that shows up as association-based avoidance blocks good opportunities. The pattern is the same one Goodhart's Law describes: the measurable proxy attracts the effort, and the purpose behind it quietly loses funding.
How the Lab designs around it
The redesign move is to separate the object from its history with evidence. Design against it the way you would design against a known failure mode — assume it will appear, and price the exploit before someone finds it.
Famous Experiments
Pending editorial review.
Design Principles
- Separate the object from its history with evidence.
Measurement Approaches
Pending editorial review.
Evidence
Pending editorial review.
Pending editorial review.
The Perverse Incentive Lens™
How this behavior is exploited — and how to redesign around it.
- Separate the object from its history with evidence.
Pending editorial review.
Pending editorial review.
Interactive Mini Network
Click any neighbor to re-center the graph and follow the threads of connection.
Knowledge Graph Neighbors
Auto-linked to the rest of the Human Behavior Taxonomy by family, domain, dimension, and shared keywords.
We attribute our own actions to situations but others' actions to their character.
We favor people who are similar to us or who like us.
Systematic errors in explaining the causes of behavior — yours or others'.
Behaviors spread through groups via observation and imitation.
Faces and brands look more appealing in a group than individually.
Giving polite rather than honest answers to avoid offense.
Judging phenomena by the standards of one's own culture.
Symptoms or beliefs spread through a group with no underlying physical cause.
Ideas, behaviors, and attitudes spread through social networks.
A group decides on a course of action that nobody actually wants, because everyone assumes others prefer it.
Power tends to corrupt, and absolute power corrupts absolutely.
Sacrificing for others without expecting a personal reward.
Where Contagion Bias is cited in the corpus
Essays, field guides, and diagnostics from The Incentives Lab that apply this element.
- EssayGoodhart's Law in the Real World
How measurable proxies capture judgment.
- EssayThe Perverse Incentives Hiding in Your KPIs
Cognitive shortcuts turned into scorecards.
- EssayAI Agents Inherit Your Incentives
How this element propagates into automated systems.
- ReferenceThe Periodic Table of Human Behavior
The full 1,267-element map this page belongs to.
- CourseIncentives 101
The free ten-part primer on reading a payoff structure.
Questions about Contagion Bias
- What is Contagion Bias?
- Contagion Bias is avoiding contact with people or things perceived as 'contaminated'. It sits in the Cognition dimension (COG) of the Human Behavior Taxonomy™ as element HBT-COG-0183, within the Social family. The core principle: avoiding contact with people or things perceived as 'contaminated'. In incentive terms, it matters because it changes the payoff people perceive before they choose — which means it can be designed for, or exploited.
- What is an example of Contagion Bias?
- Association-based avoidance blocks good opportunities. The Incentives Lab catalogs everyday, organizational, and historical instances of this element on its Human Behavior Taxonomy™ page (HBT-COG-0183).
- How is Contagion Bias exploited?
- Association-based avoidance blocks good opportunities.
- How do you design around Contagion Bias?
- Separate the object from its history with evidence.
- Which behavioral dimension does Contagion Bias belong to?
- Contagion Bias is classified in the Cognition dimension (COG) of the Human Behavior Taxonomy™, family "Social", class "Mental Model". Its permanent identifier is HBT-COG-0183 and its evidence grade is B.