MENTAL MODEL · M2215

The Peltzman Effect

BusinessHigh supportEconomics

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Version 1.0.0 · Updated 2026-07-30

CORE DEFINITION

When people feel safer, they tend to engage in riskier behavior, offsetting the benefits of safety measures. -

SCAFFOLDING EFFECT

psychology

Reduce cognitive load

The side effect of a sense of security. - After mandatory seatbelt laws, the total number of car accidents did not significantly decrease because drivers felt safer with seatbelts and drove faster and more aggressively. When skiers wear helmets, they attempt more dangerous maneuvers. True safety is not about eliminating risk (which leads to recklessness) but maintaining a 'moderate respect' for risk.

anchor

Anchor fast decisions

Risk compensation theory suggests that when people perceive external safety measures, they subconsciously reduce their own caution, using more risky behavior to 'rebalance' to their original risk preference level. At the neural level, a sense of safety reduces alertness to danger, decreasing sensitivity to marginal risk. Net behavioral risk ≈ system safety gain − risk actively added by the actor, and these often cancel out or even reverse.

MINIMUM ACTION

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Practice this model in one real situation:

Identify whether a safety measure is perceived by users as 'safer'
Observe whether users thereby relax their original vigilance (e.g., higher speeds, fewer double-checks)
Assess whether net risk actually decreases, rather than only looking at equipment metrics
In design, retain moderate uncertainty (e.g., real-time warning feedback) to avoid creating an illusion of absolute safety.

Check to track your progress (stored locally)

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Source support: Explicit

link
zh.wikipedia.orghttps://zh.wikipedia.org/wiki/%E8%90%A8%E5%A7%86%C2%B7%E4%BD%A9%E5%B0%94%E5%85%B9%E6%9B%BCZH · Explicit
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