This man's showed that people who have seen each other, but never interacted, are more likely to introduce themselves in unfamiliar situations, known 
This man's showed that people who have seen each other, but never interacted, are more likely to introduce themselves in unfamiliar situations, known as the "familiar stranger" effect. He also dropped letters addressed to "Friends of the Nazi Party" and Children's Hospitals on the ground to see which would be mailed. In addition to the Lost Letter experiment and the Small World experiment, he may be better known for an experiment presented as a learning task between "teachers" and "students" that required subjects to deliver electric shocks. For 10 points, name this psychologist best known for his namesake experiment on obedience to authority.
This man's showed that people who have seen each other, but never interacted, are more likely to introduce themselves in unfamiliar situations, known as the "familiar stranger" effect.
Stanley Milgram