Cognitive Scaffold

Preparing your thinking workspace

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MENTAL MODEL · M4063

Default Effect

Default Effect
BusinessHigh supportBehavioral Economics
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Updated 2026-08-01

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INTRODUCTION

English translation pending.

CORE DEFINITION

A finding from behavioural economics, documented most influentially by Eric Johnson and Daniel Goldstein in a study of organ donation across European countries. Where consent was presumed unless one opted out, donation rates exceeded ninety percent; where consent had to be actively given, rates fell below twenty percent. The default is powerful because of status quo bias, the effort of opting out, and the inference that the pre-set option is the recommended or normal one. It matters most where preferences are weak or the choice is complex, and it raises ethical questions whenever the chooser's interest and the designer's diverge.

SCAFFOLDING EFFECT

psychology

Reduce cognitive load

- Setting design: Choose the default by the outcome you would defend if the chooser never acted at all. - Friction audit: Count the clicks and forms needed to opt out before calling a choice genuinely free. - Consent check: Ask whose interest the pre-set option actually serves and who bears its cost.

anchor

Anchor fast decisions

Inertia rather than preference drives the effect. Most people never open the settings page, and the effort of changing a pre-set value exceeds the perceived benefit. The default also carries an informational signal: if the provider chose it, it is probably the safe or expected option, so ambiguity resolves in its favour. Three forces therefore stack, and a choice made once by a designer is reproduced thousands of times by users who never made it at all.

MINIMUM ACTION

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Source support: Explicit

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