Detailed Instructions: In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.
Q: This psychologist planted letters in public places in his ""lost letter"" experiment. He conducted an experiment in which participants where asked to forward letters to acquaintances. That experiment, the small world experiment, popularized the idea of ""six degrees of separation. "" In his most famous experiment, an actor claiming to have a heart condition was quizzed on word pairs. For 10 points, name this psychologist who tested obedience by asking participants to administer electric shocks.
A:
Social Science