“…Research on knowledge communities, communities of practice, and communities of learners has focused primarily on formation and sustainability issues (e.g., Akkerman, Petter, & De Laat, 2008;Dooner, Mandzuk, & Clifton, 2008;Erickson, Minnes Brandes, Mitchell, & Mitchell, 2005) or on the roles of these communities in facilitating learning processes (e.g., Boud & Middleton, 2003;Klein, Connell, & Meyer, 2005;Ten Dam & Blom, 2006). Empirical research into individual or organizational learning outcomes of knowledge communities, however, remains scarce (see Mittendorff, Geijsel, Hoeve, De Laat, & Nieuwenhuis, 2006 for an exception).…”