A psychological phenomenon known as the “IKEA effect” explains why people often value items they build themselves more highly, according to research cited by Brazilian outlets Em and TUPI. A 2012 Harvard study found participants valued self-assembled items significantly more than identical pre-made versions, with financial valuations up to 62.5% higher for DIY creations.
The Psychological Mechanism Behind the IKEA Effect
The IKEA effect describes the tendency to value objects more when individuals contribute to their creation, according to Em. This phenomenon is linked to a sense of autonomy and accomplishment, with successful task completion strengthening the emotional attachment.
Experimental Evidence and Financial Valuations
TUPI detailed the original 2012 Harvard Business School study that quantified this effect. Participants who assembled IKEA boxes, folded origami, or built Lego sets valued their creations significantly higher than identical items made by others. For example, those who built a box offered $0.78 for it, compared to $0.48 for a pre-assembled version.
The study also showed the effect vanished when tasks were incomplete or failed. When the object is finished, there’s a visible result of the effort, Em noted. If the assembly fails, that sense of achievement weakens. This suggests the effect hinges on successful completion, not just effort.
Why the Effect Matters in Everyday Life
The IKEA effect extends beyond furniture. TUPI highlighted examples like homemade recipes, handcrafted items, or personal projects, where creators often perceive greater value than outsiders. This can lead to disputes, as those who build something may expect others to share their enthusiasm. People who create something often assume others will see the same value, TUPI noted, citing household debates over DIY projects.
Even when these factors were isolated, the effort of building remained a key driver of valuation.
Unresolved Questions and Broader Implications
While the studies confirm the IKEA effect, they leave open why people expect universal agreement on their creations. This raises questions about social perception and the limits of personal bias in shared spaces.
| Situation | Lance médio (US$) |
|---|---|
| Caixa montada pelo próprio participante | 0,78 |
| Mesma caixa entregue pronta | 0,48 |
| Origami avaliado pelo próprio autor | 0,23 |
| Mesmo origami avaliado por outras pessoas | 0,05 |
| Origami de especialista avaliado por outras pessoas | 0,27 |
The findings underscore how effort shapes perception, even when objective quality remains unchanged.