Field experiment (Cialdini et al. 1975):
– Students approached on campus; request to volunteer to spend 2 hrs per week, for 2+ years, as unpaid counsellors at a juvenile detention centre.•
No one agreed– Then they were requested on just one occasion to escort a group of offenders from the detention centre on a two-hour trip to the zoo
• 50% agreed– Only 17% in the control group who received only the second, smaller request agreed