Probability Neglect
Updated 2026-08-13
INTRODUCTION
English translation pending.
CORE DEFINITION
Probability neglect describes the tendency for emotional reactions to a possible outcome to override its stated probability, so that a highly emotional but unlikely event feels far more likely than it is. The core proposition is that people respond to the severity and imaginability of an outcome rather than to its frequency, which produces excessive fear of rare harms and excessive hope for rare gains. The key qualification is that the effect is strongest when emotion is intense and the probability is small, since large probabilities are harder to ignore.
SCAFFOLDING EFFECT
Reduce cognitive load
- Frequency check: restate the risk as a base rate before deciding how much to fear it. - Emotion flag: notice when your reaction is proportional to the imagery rather than to the number. - Expected value: compute severity multiplied by probability instead of judging by severity alone.
Anchor fast decisions
Emotional responses are triggered by the concrete features of an outcome, and a vivid image produces a strong reaction regardless of how often the outcome occurs. Because the reaction arrives before any calculation, it anchors the judgment and the probability is adjusted afterward or not at all. Expected-value reasoning counters this only when it is applied deliberately.
MINIMUM ACTION
In progress 0/1Practice this model in one real situation:
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Source support: Explicit
- en.wikipedia.orghttps://en.wikipedia.org/wiki/Neglect_of_probabilityverified
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