The IKEA Effect
The IKEA effect shows that people don’t just value what they build, they value what they finish building.
What Is It?
The IKEA effect is the tendency to place a disproportionately high value on things we’ve built or partially built ourselves, named for the furniture retailer that has customers assemble their own purchases.
Michael Norton, Daniel Mochon, and Dan Ariely demonstrated it experimentally in a series of studies, having participants assemble IKEA boxes, fold origami, and build with Lego. People valued their own amateur creations nearly as highly as expert-made equivalents, and expected other people to agree.
The effect carries a condition that rarely makes it into the popular version: it only holds when the task is completed successfully. When participants built something and then watched it get destroyed, or never finished it, the inflated valuation disappeared.
Why Does It Matter?
Organizations reach for this concept constantly in change management: involve people in designing the change and they’ll feel ownership over it. That’s broadly true, but the completion requirement usually gets left out. A workshop where employees contribute ideas that quietly go nowhere, or a pilot that gets shelved before it ships, doesn’t reliably produce buy-in. It can produce the opposite. People remember contributing effort to something that was never finished, which is closer to the condition that made the effect disappear in the original studies than to the condition that produced it.
What Changes Once You See It?
You stop treating “we asked for input” as equivalent to “people will feel ownership.”
You start asking whether the thing people contributed to actually got built, in a form they can point to and recognize as theirs.
The value isn’t produced by soliciting participation. It’s produced by finishing what people participated in.
Common Misunderstandings
- It is not simply about effort. Effort that doesn’t lead to a completed, working result doesn’t reliably produce the effect, and may produce resentment instead.
- It is not the same as ownership in a legal or financial sense. People show the effect even over things they don’t own and won’t keep, as long as they built them.
- The famous cake-mix story, that 1950s bakers rejected instant cake mix until manufacturers required them to add a fresh egg, is usually told as clean proof of effort-justification. Historian Laura Shapiro’s research complicates it: fresh eggs also produced a genuinely better-tasting cake, a confound the popular version leaves out entirely. The underlying psychological effect may be real, but this particular anecdote overstates how cleanly it was demonstrated.
- It doesn’t scale in a straight line. More effort or more customization doesn’t necessarily produce proportionally more attachment, and forced participation in something people never wanted to build doesn’t reliably produce it either.
Diagnostic Question
Did the people who contributed to this actually see it get finished, in a form they’d recognize as something they helped build?
Explore Further
Field Notes
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Origin
Michael Norton, Daniel Mochon, and Dan Ariely coined and demonstrated the effect in “The ‘IKEA Effect’: When Labor Leads to Love,” published in the Journal of Consumer Psychology in 2012.