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: His time teaching in New York inspired his lament of higher education, The University in Exile. Those later years were also devoted to the general problem of learning, resulting in the posthumous publication Productive Thinking. After a public debate with Jung over word association technique in 1906, he moved around Europe until a 1912 train ride prompted thoughts on illusory motion, which led to his formulation of the phi phenomenon. FTP, name this thinker who, along with Kurt Koffka and Wolfgang Kohler, founded the gestalt school of psychology.
A:
Social Science