Agreeableness, empathy, and helping: a person x situation perspective.
J Pers Soc Psychol. 2007 Oct 1; 93 (4): 583-99.
The interactive effects of belongingness and charisma on helping and compliance.
J Appl Psychol. 2007 Jul 1; 92 (4): 1131-9.
Personality and motivational antecedents of activism and civic engagement.
J Pers. 2010 Dec 1; 78 (6): 1703-34.