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MENTAL MODEL · M2229

Scope Neglect

Scope Neglect
Learn & MetacognitionHigh supportCognitive Psychology
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Version 1.0.0 · Updated 2026-07-30

CORE DEFINITION

The human brain cannot intuitively process 'orders of magnitude'. We are willing to spend the same amount of money to save 2,000 birds as to save 200,000 birds. When numbers become sufficiently large, they become abstract symbols that fail to evoke proportional emotional responses.

SCAFFOLDING EFFECT

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Correction for the blind spot of large numbers. - Distinction: It is the mathematical version of the 'identifiable victim effect'. - This explains why we may be unmoved by the prospect of 'a billion deaths from nuclear war' yet desperately concerned about a trapped puppy. In macro-level decisions (e.g., climate change, pandemic control), we must rely on rational mathematical calculation.

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Scope neglect refers to the phenomenon that people's emotional/valuation responses do not scale proportionally with the magnitude of the quantity; once a large number exceeds the 'imaginable' threshold, it collapses into the same abstract symbol. The mechanism is that the emotional system is triggered by 'identifiable individuals' rather than statistical magnitudes—the identifiable victim effect is a special case. Hence, people are willing to pay similar amounts for 2,000 and 200,000 birds.

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Source support: Explicit

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    en.wikipedia.orghttps://en.wikipedia.org/wiki/Scope_neglectZH · Explicit
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