Inverted U-Curve
Updated 2026-08-10
INTRODUCTION
English translation pending.
CORE DEFINITION
A shape observed across psychology and economics in which an outcome improves as a driver increases, peaks at an intermediate level, and then declines. The best-known instance is the Yerkes-Dodson law, which links arousal or stress to performance. The core proposition is that moderation is optimal for many variables. The key qualification is that the turning point differs by person, task, and context, so it must be located empirically rather than assumed.
SCAFFOLDING EFFECT
Reduce cognitive load
- Optimum search: test whether a relationship curves rather than rising monotonically. - Turning-point estimate: find the level where the next increment starts to hurt. - Directional fix: add the variable below the peak and cut it above the peak.
Anchor fast decisions
Two opposing forces act on the same outcome. Up to a point the variable supplies needed activation, attention, or resources, so the outcome improves. Beyond the optimum the same variable begins to consume the capacity that produced the gain, through overload, interference, or diminishing slack. The net effect therefore reverses, and the peak sits where the two forces balance.
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/Yerkes%E2%80%93Dodson_lawverified
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