The IKEA Effect
Marketing lore and common sense tells us we value the things we make more than the things we buy already made. That even holds true when we assemble things from a kit, according to research published in the Journal of Consumer Psychology.
Experiment 1A: Participants either inspected an IKEA pre-built box or assembled it themselves. Afterward, they were asked to bid on the box they had either seen or built. If their bid was above a random number, they would pay that amount to keep the box; if it was lower, they couldn’t keep it. Participants were also asked to self-report on the value of the box. An effect was found in both cases; on average, participants bid 62% more when they built the box versus when they simply inspected it. On average, participants also self-reported liking the self-built box more than the inspected boxes.