“…Results of Van Dijke and Poppe (2004; see also Poppe, 2003;Van Dijke & Poppe, 2003) support the notions of Tjosvold et al (1991) and Kotter (1978Kotter ( , 1985, that people sometimes increase their social power when it is instrumental for an increase of their personal power. In this study, like in the studies by Wilke (1992, 1993) and Mulder and his colleagues (Mulder, Veen, Hartsuiker, & Westerduin, 1971;Mulder, Veen, Hijzen, & Jansen, 1973;Mulder, Veen, Rodenburg, Frenken, & Tielens, 1973), participants worked together with others in a hierarchical group.…”