Daniel G. Goldstein is an American cognitive psychologist known for the specification and testing of heuristics and models of bounded rationality in the field of judgment and decision making. He is an honorary research fellow at London Business School and works with Microsoft Research as a principal researcher.Mehmet Cengiz Oz, known professionally as Dr. Oz, is a Turkish American television personality, cardiothoracic surgeon, Columbia University professor, pseudoscience promoter, and author.