Field experiment in New City
1. Leonard Bickman (1974) had three confederates dress in different outfits-jacket and tie, a milkman's outfit and a security guard's uniform
2. The confederates individually stood in the street and asked passers-by to perform tasks such as picking up litter or handing over a coin for the parking meter
3. People were twice as likely to obey the assistant dressed as a security guard than the one dressed in jacket and tie