With personality or, more generally, individuality we take as our level of analysis the person (not necessarily a human person). But personality could just the consistent, differentiated behavior of a particular system.

• Margaret K. Wray, Heather R. Mattila, Thomas D. Seeley, Collective personalities in honeybee colonies are linked to colony fitness, Animal Behaviour, In Press, Corrected Proof, Available online 6 January 2011, ISSN 0003-3472, DOI: 10.1016/j.anbehav.2010.11.027.