For ten points, identify this social psychologist most notable for his Realistic Conflict Theory and the Robber's Cave Experiment, a Turkish-American man who wrote Groups in Harmony and Tension.
This psychologist developed the Own Categories Technique, which he wrote about in a paper which discussed its use in Reference Scale and Placement of Items. He also published The Psychology of Ego- involvements and edited the publication Social Psychology at the Crossroads. The lack of a frame of reference produces the effect that this man studied in his dissertation, in which a dot of light appears to move although it does not in reality; that effect is the autokinetic effect. One theory associated with this man emphasized  the role of superordinate goals in the process of conflict reduction. That theory arose from an experiment that this man ran in conjunction with his wife that took two groups of young children and divided them into separate camps at the namesake state park. For ten points, identify this social psychologist most notable for his Realistic Conflict Theory and the Robber's Cave Experiment, a Turkish-American man who wrote Groups in Harmony and Tension.
This psychologist developed the Own Categories Technique, which he wrote about in a paper which discussed its use in Reference Scale and Placement of Items.
Muzafer {Sherif}