Behavioral revolution and new institutionalism (edit)
In the 1950s and the 1960s, a behavioral revolution stressing the systematic and rigorously scientific study of individual and group behaviour swept the discipline. A focus on studying political behaviour, rather than institutions or interpretation of legal texts, characterized early behavioral political science, including work by Robert Dahl, Philip Converse, and in the collaboration between sociologist Paul Lazarsfeld and public opinion scholar Bernard Berelson.