What do a flat-packed IKEA box, a folded origami frog, and a coffee mug have in common with the poster you just hung up? According to two of behavioral economics’ most frequently cited studies, you value them more than they’re worth, and it’s because of what you’ve done with them yourself. A poster you chose, measured, framed, and hung with a spirit level becomes something different in your own mind from the same poster hung by someone else. This article reviews what the research actually found, where the effect ends, and what it means when you’re making the wall at home your own.
Quick facts: The study "The IKEA effect: When labor leads to love" by Michael Norton, Daniel Mochon, and Dan Ariely was published in the Journal of Consumer Psychology 22(3), 2012, pages 453–460. Participants who assembled IKEA boxes themselves were willing to pay 63 percent more than those who examined a fully assembled box. Kahneman, Knetsch, and Thaler’s 1990 coffee mug study (Journal of Political Economy 98(6), pages 1325–1348) showed that owners demanded about twice as much for their mugs as buyers were willing to pay.
What Norton, Mochon, and Ariely actually measured—and why 63 percent is the number to remember
The researchers had participants assemble simple IKEA storage boxes and then set a price for them. A comparison group was only allowed to look at an identical, fully assembled box. The difference was striking: those who had assembled one themselves were willing to pay 63 percent more. The box wasn’t more beautiful, better made, or more functional. The only difference was that the participants had put work into it.
What makes the study useful for anyone decorating their home is that the researchers didn’t settle for just one measurement. They repeated the experiment with origami and Lego, and in every variation, the results pointed in the same direction. The authors themselves describe a clear boundary, and it’s crucial: labor leads to love only when it leads to a finished result. When participants were allowed to build and then watched their creations being taken apart, or when they didn’t have time to finish, the effect disappeared. Unfinished work doesn’t bring extra appreciation. It brings frustration instead.
The same study also showed that the effect applies to both skilled hobbyist woodworkers and beginners. So you don’t need to be good for it to work. You just need to have made something that was finished.
Origami Frogs: Why Amateurs Value Their Own Handiwork Like a Master’s
The most telling experiment involved origami. Participants were given instructions and folded a frog or a crane. They were then asked to put a price on their own creation. Other groups, who hadn’t folded anything, were asked to value the builders’ paper figures and, as a control, figures folded by an expert.
The builders valued their own figures at about five times more than outsiders did. And most revealing of all, they expected others to agree. The researchers write that participants saw their amateur creations as equivalent to those made by experts and expected the outside world to share that assessment. It didn’t.
Applied to the wall at home, the mechanism is familiar. Someone who chose ten posters, planned a gallery wall on paper, measured the spacing, and hung them in the right order sees the result with a fond eye. The guest in the hallway sees a wall. You see a project that worked out. There’s nothing wrong with that, and that’s exactly why your own gallery wall often feels better to you than the same gallery wall in an interior design photo. You’re not looking at the picture; you’re looking at your own work.
"You don’t necessarily love the poster you put up because it’s the best one - you love it because you’re done with it."
The 1990 coffee mug: ownership as a second explanation
The IKEA effect is related to an earlier discovery. In an experiment by Daniel Kahneman, Jack Knetsch, and Richard Thaler, published in the Journal of Political Economy in 1990, one group of students was given coffee mugs while another group received none. Those who owned a mug wanted about twice as much to sell it as those without one were willing to pay. According to Big Think’s review of the study, owners were unwilling to sell for less than $5.25, while those without a mug were unwilling to pay more than $2.25 to $2.75. The theory predicted that about half the mugs would change hands. In practice, far fewer did.
The authors concluded that the seller’s demand far exceeds the buyer’s willingness to pay, and that this cannot be explained by transaction costs. Later research has nuanced the picture. In 2009, Carey Morewedge and colleagues showed that buyers who already owned an identical mug paid as much as sellers asked, and argued that it is the feeling of ownership, not fear of loss, that drives the effect. In 2010, William Maddux and colleagues showed that under certain conditions, the effect is stronger in Western cultures than among Japanese participants.
The point for people buying art is that two mechanisms operate at the same time. One is the work: you’ve chosen, framed, and hung it. The other is ownership: the moment the poster is yours, its value increases, without anything changing in the image itself. Together, they explain why it’s so hard to sell or give away a picture you’ve had hanging for five years, and why “that one I never really liked anyway” rarely leaves the wall.
The completion requirement: why a half-finished gallery wall leaves you worse off than a blank one
The most practical finding in Norton, Mochon, and Ariely’s study is the limit of the effect. Work increases valuation only when it is completed. It’s worth reading about as an interior designer, because most homes have at least one wall that never got finished: three frames waiting for a fourth, posters leaning against the baseboard since the move, holes in the wall from measurements that changed.
In the experiment, unfinished work did not increase valuation. It’s reasonable to imagine that at home, it instead becomes a daily reminder of something left unfinished. That’s my interpretation, not the researchers’ words, but it simply explains why a completed wall feels like a small victory, while one that never got finished just becomes part of the background.
Tip: Finish the wall in one weekend. Buy the frames in advance, measure with a tape measure, and lay out a template made from packing paper before drilling or putting up tape. The clearer your endpoint, the more of the work you can put into the actual hanging, and that’s where the value takes shape.
The frame is the part of the work that stands out most
Choosing the frame, mount, and glass is the step where most buyers actually make a personal contribution. So it makes sense not to leave it to someone else. Browse frames in different materials, and consider wooden frames alongside metal before you decide. We’ve covered how the frame affects the image itself in the article on the psychology of framing, and if you’d rather hang it without a frame, there’s a comparison in the guide to poster hangers or frames.
The trap: when doing the work yourself softens your judgment
The research has a downside, and it deserves to be taken seriously. Because the work increases your valuation, you can become blind to the fact that a composition isn't actually working. In the original study, the builders expected others to agree with their pricing, but they didn't. It's a useful warning sign: if you've spent three evenings on a gallery wall, you're the worst person to judge it.
A replication by Sarstedt, Neubert, and Barth, published in the Journal of Marketing Behavior in 2017, used loom bands instead of IKEA furniture and confirmed the effect. They also found that destroying the product clearly reduced willingness to pay. This underscores that the result is hardly a one-off finding.
There's a practical solution. Take a photo of the wall, turn your phone upside down or view the image in black and white, and ask a friend to tell you what's distracting. This counteracts the leniency that the work has created and lets you see the composition as a stranger would. It's the same trick many photographers use: flipping an image to discover flaws.
How to use the IKEA effect to make better choices, not just love things more
There's a way to turn the research to your advantage: put the work before the choice instead of after it. That means putting your energy into making a thoughtful decision about the subject, color, and format, rather than hanging up the first thing you find and letting the feeling of ownership do the rest. You'll still get the feeling of having succeeded.
One concrete approach is to create something you're personally involved in making. For example, you could create a personalized poster using your own image or text. The work is literally yours, and research suggests you'll appreciate the result more than if you'd bought the same image ready-made. The second approach is to choose a design from works by famous artists that you take the time to learn about. The more you know about the image, the more choosing it becomes an accomplishment of your own.
The third approach connects to another finding we've described before, namely that a painting often grows on us over time. You can read more about this in the article on the mere exposure effect. The IKEA effect and mere exposure pull in the same direction: the longer you live with something you chose and hung yourself, the more you like it.
Frequently asked questions about the IKEA effect and wall art
Anyone who wants to dig deeper can read the original study through the Harvard open archive and the abstract of the coffee mug study at RePEc. Next time you’re standing in front of a bare wall with a tape measure and a level, what you’re doing isn’t just decorating. It’s work that, if you finish it, increases the value of every poster you hang. Start by choosing the artwork thoughtfully, framing it, and finishing the wall before the weekend is over.