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Concept

IKEA effect

We value what we built ourselves more highly, even if it came out worse than if someone else had made it.

In Spanish
Efecto IKEA
Origin
Norton, Mochon and Ariely (2012)

What problem it addresses

It explains why our own effort increases attachment to a product, a project or an idea.

An example

Some people assembled an IKEA box; others received the same box already assembled. Then everyone bid on it.

Box already assembledAverage bid$0.48Pre-assembled
Average bid: $0.48.
Box they assembledAverage bid$0.78Self-assembled
Average bid: $0.78.

They offered 63% more for the box they had assembled. The effect disappeared if they didn’t finish it.

Why it happens

  1. Putting effort into something makes us feel capable.

  2. What we have made says something about us,

  3. so we value it more than the same thing made by others.

Applications in design

  • Use it like this

    Let people customize or configure something: they will get more involved.

  • Avoid

    Adding unnecessary work just to increase attachment.

  • Don’t fall for it

    When you defend your own idea, ask an outsider to compare it with others.

+63%

What the research says

That is how much more people offered for the box they had assembled themselves (Norton, Mochon and Ariely, 2012).

Solid evidence. The same happened with origami figures: their makers valued them almost as much as those made by an expert.

Authors and works

  1. 2012

    Michael Norton, Daniel Mochon and Dan Ariely

    Named it and measured it with IKEA boxes and origami figures.

Sources

Original sources

Last reviewed: