MENTAL MODEL · M4364

Ecological Rationality

DecideHigh supportDecision Science

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Version 1.0.0 · Updated 2026-07-30

CORE DEFINITION

Human intuition and heuristics may appear to violate the 'perfect rationality' of logic, but in specific environmental structures, they are often more accurate and efficient than complex calculations. Rationality is not logical consistency but adaptation to the environment.

SCAFFOLDING EFFECT

psychology

Reduce cognitive load

To vindicate intuition and rules of thumb. In the real world with incomplete information and time pressure (e.g., emergency medicine, investing), relying on simple heuristics (e.g., 'when catching a ball, fix your gaze on the ball and adjust your running speed to keep the angle constant') often outperforms solving differential equations.

anchor

Anchor fast decisions

Ecological rationality (Gigerenzer) holds that whether a heuristic is rational depends on whether it matches the information structure of the environment, not on whether it conforms to logical optimality. It defends positive heuristics.

MINIMUM ACTION

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Practice this model in one real situation:

First characterize the statistical structure of the environment (e.g., variance, correlations). Then choose simple heuristics that match it. Evaluate decision rules by their environmental fit.

Check to track your progress (stored locally)

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Source support: Explicit

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