%0 Journal Article %A Altink, Wieby %T Wie of wat bepaalt hoe we groepen definiƫren? %D 2012 %J Gedrag & Organisatie, %V 25 %N 3 %@ 1875-7235 %R https://doi.org/10.5117/2012.025.003.275 %K personnel selection,group differences,generalization issue,validity %I Amsterdam University Press, %X Who and what determines the definition of groups? A relevant issue in the psychology of personnel selection Who and what determines the definition of groups? A relevant issue in the psychology of personnel selection In this article we start a discussion on the following issue. If knowledge and insights regarding personnel selection issues are not applicable to all people equally, but apply to certain (sub) groups, who and what determines the definition of groups? Is this mainly a research-driven issue or is the answer to this question also (partly) determined by personnel selection practitioners? We discuss the usefulness of grouping, and describe two examples: one in which research suggests the importance of group differences, and a second example in which the differences between groups are thought to be of importance according to employers and practitioners. We observe that there are different approaches available in dealing with the generalization issue. Obviously, the question who determines to which group a person belongs deserves more attention from both theory and practice in personnel selection. %U https://www.aup-online.com/content/journals/10.5117/2012.025.003.275