title: Blood, sex, personality, power, and altruism: factors influencing the validity of strong reciprocity.
abstract: It is argued that the generality of strong reciprocity theory (SRT) is limited by the existence of anonymous spontaneous cooperation, maintained in the absence of punishment, despite free-riding. We highlight how individual differences, status, sex, and the legitimacy of non-cooperation need to be examined to increase the internal and ecological validity of SRT experiments and, ultimately, SRT's external validity.
authors.affiliation: Personality and Social Psychology Group, School of Psychology, University of Nottingham, Nottingham, NG7 2RD, United Kingdom. eamonn.ferguson@nottingham.ac.uk
authors.forename: Eamonn
authors.initials: E
authors.lastname: Ferguson
authors.forename: Philip
authors.initials: P
authors.lastname: Corr
mesh_terms: D003299:Cooperative Behavior; D005716:Game Theory; D006801:Humans; D008960:Models, Psychological; D011678:Punishment / Q000523:psychology*; D012919:Social Behavior