 The new doctor of psychology's impressive dissertation earned him a job in 1949 at the University of Minnesota's Laboratory for Research in Social Relations.Beginning as an assistant professor, Schachter soon moved his way through the ranks of professorship; he became an associate professor in 1954 and then obtained the title of full professor in 1958, in large part thanks to his extensive research and writing.During the first decade of his career in psychology, Schachter authored or co-authored five books, four of which ("Social Pressures in Informal Groups" [1950], "Theory and Experiment in Social Communication" [1950], "When Prophecy Fails" [1956] – written with Festinger and Henry Riecken, describing what happened to millennial groups after their predicted date for the end of the world had passed –, and "The Psychology of Affiliation" [1959]) are still highly influential.