Several authorities have provided definitions of international psychology. For example, Holtzman (2000) states,
International psychology refers to scientific or professional activities (organizations, exchanges, and research enterprises) of a psychological nature involving groups of psychologists in two or more nations. Such activities are generally aimed at advancing psychological science or improving the practice of psychology through organizational efforts in one or more nations…. Occasionally, the term international psychology is also used to designate the social psychology of international relations. Studies of attitudes toward war and peace, national stereotypes, or international affairs are often undertaken to improve understanding of international relations. (p. 343)
Stevens and Wedding (2004) provide a different but complementary definition:
International psychology is a disciplinary and professional specialty that targets a variety of phenomena ...