van Stekelenburg, J., Anikina, N.C., Pouw, W.T.J.L., Petrovic, I. and Nederlof, N. 2013. From Correlation to Causation: The Cruciality of a Collectivity in the Context of Collective Action. Journal of Social and Political Psychology. 1, 1 (Dec. 2013), 161-187. DOI:https://doi.org/10.5964/jspp.v1i1.38.