A Behavioral Science Experience

The Power of
Defaults

The most influential force in your decision-making is the option you never chose.

Live Demonstration

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What is a default?

A default is the pre-selected option that takes effect when you make no active choice. It is the answer the system gives when you stay silent.

Defaults are everywhere: the privacy settings on your phone, the coverage amount on your insurance plan, the investment allocation in your retirement account. Most people never change them. And that turns out to be one of the most consequential facts in behavioral science.

~90%
donation consent rate in countries with opt-out organ donation policies, versus roughly 15% in opt-in countries
$300B+
added to US retirement savings after automatic 401(k) enrollment became widespread in the early 2000s
$20B
Google paid Apple in 2022 to remain the default search engine in Safari. Defaults are worth billions.

Why this matters

Defaults are not neutral. Every system has them, and someone designed them, whether carefully or carelessly. Understanding how they work is one of the most practical things you can learn.

This site is a reference, a laboratory, and a field guide. The interactive exhibits are built to be experienced, not just read.

Start with The Science