MIXORA
Menu
Search MixoraArt of Color15 color toolsArt of Thought15 writing toolsConcepts

MIXORA CONCEPT

Sunk-cost fallacy

Continuing a choice because of resources already spent even when those resources cannot be recovered and no longer improve the future options.

thoughtModerate evidence
IN PLAIN LANGUAGE

Past cost can explain regret or responsibility, but a forward-looking decision should compare the remaining benefits and costs of each available option. Continuing only to justify the past can deepen the loss.

What “Moderate evidence” means

The pattern has meaningful research support, but its size or reliability depends more strongly on context, population, measurement or competing explanations.

Marker-board illustration created specifically to explain Sunk-cost fallacy: Continuing a choice because of resources already spent even when those resources cannot be recovered and no longer improve the future options.VISUAL EXPLANATION · MARKER BOARD
Continuing a choice because of resources already spent even when those resources cannot be recovered and no longer improve the future options.
EXAMPLE

Finishing an unusable painting solely because ten hours were already spent ignores what the next hour could achieve elsewhere.

COMMON CONFUSION

Past effort can create future value, skill or obligations; it is sunk only when it cannot change the remaining comparison.

ASK YOURSELF

If I inherited this situation today with no past investment, what would I choose next?

RELATED CONCEPTS
thoughtLoss aversion

A pattern in which losses relative to a reference point can influence choices more strongly than comparable gains.

→thoughtMotivated reasoning

Reasoning shaped by a preferred conclusion, identity, emotion or practical incentive.

→thoughtCognitive dissonance

An uncomfortable state associated with inconsistency among beliefs, attitudes, self-conceptions or behavior.

→thought × bridgeEvidence

Information that raises, lowers or otherwise constrains rational confidence in a claim.

→

SOURCES & TRUST

References

Last reviewed

  1. 01
    The Psychology of Sunk Cost

    Hal R. Arkes & Catherine Blumer · 1985 · Organizational Behavior and Human Decision Processes

    Experiments and field evidence on continuing an endeavor after unrecoverable investment.
    Academic source
What the source labels mean
Primary source
Original work, experiment, standard or historical text.
Academic source
Scholarly research or review published for an academic audience.
Reference source
An expert standard, encyclopedia or institutional explanation that summarizes a field.
General reference
A practical specialist resource useful for application, but not treated as decisive research by itself.