title: The effect of altruistic tendency on fairness in third-party punishment.
abstract: Third-party punishment, as an altruistic behavior, was found to relate to inequity aversion in previous research. Previous researchers have found that altruistic tendencies, as an individual difference, can affect resource division. Here, using the event-related potential (ERP) technique and a third-party punishment of dictator game paradigm, we explored third-party punishments in high and low altruists and recorded their EEG data. Behavioral results showed high altruists (vs. low altruists) were more likely to punish the dictators in unfair offers. ERP results revealed that patterns of medial frontal negativity (MFN) were modulated by unfairness. For high altruists, high unfair offers (90:10) elicited a larger MFN than medium unfair offers (70:30) and fair offers (50:50). By contrast, for low altruists, fair offers elicited larger MFN while high unfair offers caused the minimal MFN. It is suggested that the altruistic tendency effect influences fairness consideration in the early stage of evaluation. Moreover, the results provide further neuroscience evidence for inequity aversion.
authors.affiliation: Center for Studies of Psychological Application, School of Psychology, South China Normal University Guangzhou, China ; Primary School Affiliated to South China Normal University Guangzhou, China.
authors.forename: Lu
authors.initials: L
authors.lastname: Sun
authors.affiliation: Center for Studies of Psychological Application, School of Psychology, South China Normal University Guangzhou, China.
authors.forename: Peishan
authors.initials: P
authors.lastname: Tan
authors.affiliation: Center for Studies of Psychological Application, School of Psychology, South China Normal University Guangzhou, China ; Department of Psychological and Brain Sciences, Dartmouth College Hanover, NH, USA.
authors.forename: You
authors.initials: Y
authors.lastname: Cheng
authors.affiliation: Center for Studies of Psychological Application, School of Psychology, South China Normal University Guangzhou, China.
authors.forename: Jingwei
authors.initials: J
authors.lastname: Chen
authors.affiliation: Center for Studies of Psychological Application, School of Psychology, South China Normal University Guangzhou, China ; School of Economics and Management and Scientific Laboratory of Economics Behaviors, South China Normal University Guangzhou, China.
authors.forename: Chen
authors.initials: C
authors.lastname: Qu
keywords: ERP; MFN; altruistic tendency; third-party punishment; unfair