Mind & EverydayFact
Assembled it yourself? Suddenly it's worth 63 percent more.
Norton, Mochon and Ariely had people either assemble furniture themselves or inspect pre-built pieces. The builders were willing to pay 63 percent more. With self-folded origami frogs, makers valued their work about five times higher than uninvolved observers did.
Useful: It explains why you overrate your own drafts – get judgements from people who didn't build them.
Source: en.wikipedia.org