You owe me money and I am watching you now

A behavioural biologist conducted a study in a cafeteria where people were supposed to deposit money in an honesty box when they purchased hot beverages. Each week, a poster above the box was changed: Some weeks, it featured a picture of flowers; other weeks, a large pair of eyes glared out at patrons. When the eyes were displayed, nearly three times as much money was left in the box. Even the vague feeling of being watched dramatically improved the honesty of patrons.

Weird.

From a Toronto Globe & Mail article, via Online Fandom.