A pink litter bin on the London Bridge

River Thames flows through London. People come to the London Bridge to see the Tower Bridge which allows ocean-going ships to pass beneath it.     Many visitors stopped in front of a pink public litter bin momentarily and threw litter away before crossing the bridge.     We knew adding human faces or adding controversial messages nudge our prosocial…

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Why are antibiotics over prescribed in some countries?

Antibiotic prescription rate differs across countries. It is two times greater in Korea than in Norway (27.9 vs. 15.8: Defined Daily Doses (DDDs) per 1000 people per day, 2015 OECD report). Why are antibiotics over prescribed in Korea?         One reason might be that it is difficult to find traditional medicines in Korean market. In contrast,…

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Do you tip more when you disagree?

Flam is a small village in Norway. Tourists who take the Norway in a Nutshell tours switch ferry boats here. A cozy restaurant called Bakkastova Cafe is located up on the hill.     This restaurant had a note at the cash register. It says, statistics say that women are tipping better than men. I added coins to…

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Do we need floor signage?

We now see a wide variety of floor signage. In Singapore, there is a yellow-painted footstep on the right side of the paved road at the Marina Bay. Since this road is crowded by runners, this signage probably helps them run on the right side of the road.     In Shenzhen, China, there are…

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Self experiment for behavior change

Changing behavior is important but challenging. Thus, it attracts huge attention among practitioners as well as researchers. For instance, Charles Duhigg introduced various examples in his book, The Power of Habit: Why We Do What We Do in Life and Business. Professor BJ Fogg at Stanford University proposed a behavior change model at the Persuasive Technology Lab. Designers graduating from…

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