International collaboration in psychology is on the rise

Kliegl, R., & Bates, D.M. (2011). International cooperation in psychology is on the rise. Scientometrics, 87, 149-158. Abstract. There has been a substantial increase in the percentage for publications with co-authors located in departments from different countries in 12 major journals of psychology. The results are evidence for a remarkable internationalization of psychological research, starting in the mid 1970s and increasing in rate at the beginning of the 1990s. This growth occurs against a constant number of articles with authors from the same country; it is not due to a concomitant increase in the number of co-authors per article. Thus, international collaboration in psychology is obviously on the rise.