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University of KentThree archival analyses are presented substantially extending empirical reviews of the progress of group-related research. First, an analysis of social psychological research from 1935 to 2007 (cf. showed that group-related research has a steadily increasing proportion of titles in the principal journals and currently accounts for over a sixth of all the research in our list of social psychological journals. Second, analysis of the most cited papers from a set of principal social psychology journals from 1998 to 2007 showed that a third of high-impact articles in social psychology focus on groups. Third, analysis of the content of two major specialist journals in the fi eld, Group Processes & Intergroup Relations and Group Dynamics: Theory, Research, and Practice, showed that together these journals cover a broad range of grouprelated research, and that the only keyword common to both journals was social identity. These fi ndings demonstrate the health and major contributions of research into group processes and intergroup relations to social psychology as a whole.keywords empirical review, group dynamics, group processes, group-related research, intergroup relations, research development narrative and discursive reviews by extending the time period to over 70 years, analyzing impact over the last 10 years, and exploring the themes covered over that period.There have been several reviews, comments, empirical analyses, and overviews of the nature of group research in social psychology (e.g. Bettenhausen, 1991;Davis, 1996;Jones, 1985;Levine & Moreland, 1990Manstead, 1990;McGrath, 1978McGrath, , 1997McGrath & Altman, 1966;McGrath & Kravitz, 1982;Moreland, Hogg, & Hains, 1994;Poole & Hollingshead, 2005;Sanna & Parks, 1997;Simpson & Wood, 1992;Steiner, 1974Steiner, , 1983Steiner, , 1986Tindale & Anderson, 1998;Wheelan, 2005;Wittenbaum & Moreland, 2008;Zander, 1979).Collectively, these reviews provide various insights into the theory, methodology, analysis, and applications of research in group processes and intergroup relations. According to many of the reviews mentioned earlier, group processes and intergroup relations research is central to social psychology. This feeling is characterized in many prefaces, editorials, and introductory paragraphs. However, recent reviews of research into group processes have noted that much of the research literature focuses on the individual (e.g. Wittenbaum & Moreland, 2008). Indeed, the shift in the Zeitgeist away from small groups and toward social cognition approaches was probably at the heart of Steiner's (1986) concerns, and may to some extent represent a struggle for supremacy of different levels of analysis and methodological approaches in social psychology (Abrams & Hogg, 2004;McGrath & Altman, 1966). In fact, Hornsey (2008) recently noted that some researchers have considered groups as "something of a label of convenience for what happened when interpersonal processes were aggregated" (p. 204). Commentators have linked this trend t...