text: In a study this psychologist conducted at the Westgate apartment complex, he found that "propinquity" was a significant predictor of whether people would form romantic attachments.
full_question: In a study this psychologist conducted at the Westgate apartment complex, he found that "propinquity" was a significant predictor of whether people would form romantic attachments. This psychologist theorized that people assess their own abilities with reference to people they perceive as their peers in those abilities in his "social comparison theory." In an experiment this psychologist conducted with Carlsmith, participants who turned pegs around for an hour were more likely to say it was fun if they were paid $1 than if they were paid $20. That experiment tested a theory he developed while studying an apocalyptic cult, as related in the book When Prophecy Fails. For 10 points, name this psychologist who proposed that people seek to reduce the strain of holding conflicting opinions with his theory of cognitive dissonance.
first_sentence: In a study this psychologist conducted at the Westgate apartment complex, he found that "propinquity" was a significant predictor of whether people would form romantic attachments.
raw_answer: Leon Festinger