Costly Signaling is signals whose value depends on being expensive to fake. It sits in the Cognition dimension (COG) of the Human Behavior Taxonomy™ as element HBT-COG-0195, within the Economics family. The core principle: signals whose value depends on being expensive to fake. 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
Signals whose value depends on being expensive to fake.
Plain-English Definition
Signals whose value depends on being expensive to fake.
Feynman Explanation
Cheap talk explains nothing about why peacocks have tails.
Core Principle
Signals whose value depends on being expensive to fake.
Mechanisms
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Inputs (Triggers)
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Outputs (Behaviors)
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Behavioral Signature
Cheap talk explains nothing about why peacocks have tails.
Examples
- Founders putting their own capital in alongside investors.
- Refundable guarantees are weak signals; non-refundable ones are strong.
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Original analysis from The Incentives Lab — how this element behaves inside real payoff structures.
Why this element matters to incentive design
Executives usually notice this element only after it has cost something. By then it looks like a one-off. It is not. The mechanism underneath it operates in the Cognition dimension — how do we think?. You can recognize it in the field by its signature: cheap talk explains nothing about why peacocks have tails. 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, public model evals carry weight in proportion to what they cost to game. It is amplified whenever refundable guarantees are weak signals; non-refundable ones are strong. Inside organizations that shows up as refundable guarantees are weak signals; non-refundable ones are strong. 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 tie signals to outcomes that can't be costlessly reversed. Treat it as infrastructure. Once you can see it in your own system, most of the argument about culture resolves itself.
Famous Experiments
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Design Principles
- Tie signals to outcomes that can't be costlessly reversed.
Measurement Approaches
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Evidence
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The Perverse Incentive Lens™
How this behavior is exploited — and how to redesign around it.
- Tie signals to outcomes that can't be costlessly reversed.
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.
Costly actions that credibly communicate hard-to-observe traits.
Asymmetric information attracts the worst counterparties.
A cost or benefit borne by someone outside the transaction.
Clear ownership of outcomes, not just tasks.
We defer to perceived expertise, rank, or uniform.
Vastness that exceeds existing schemas dissolves the self briefly.
Negative feedback returns a system toward a target.
Membership in a group is a baseline human need.
Individually rational choices that produce a collectively bad outcome.
We seek tasks where we feel effective and improving.
Competing loyalties that compromise judgment.
Value is judged against whatever sits next to it.
Where Costly Signaling 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.
- ReferenceThe incentive glossary
Definitions for every mental model, bias, and fallacy in the corpus.
- ReferenceThe Periodic Table of Human Behavior
The full 1,267-element map this page belongs to.
Questions about Costly Signaling
- What is Costly Signaling?
- Costly Signaling is signals whose value depends on being expensive to fake. It sits in the Cognition dimension (COG) of the Human Behavior Taxonomy™ as element HBT-COG-0195, within the Economics family. The core principle: signals whose value depends on being expensive to fake. 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 Costly Signaling?
- Refundable guarantees are weak signals; non-refundable ones are strong. The Incentives Lab catalogs everyday, organizational, and historical instances of this element on its Human Behavior Taxonomy™ page (HBT-COG-0195).
- How is Costly Signaling exploited?
- Public model evals carry weight in proportion to what they cost to game.
- How do you design around Costly Signaling?
- Tie signals to outcomes that can't be costlessly reversed.
- Which behavioral dimension does Costly Signaling belong to?
- Costly Signaling is classified in the Cognition dimension (COG) of the Human Behavior Taxonomy™, family "Economics", class "Concept". Its permanent identifier is HBT-COG-0195 and its evidence grade is C.