“…Thus, enacting punishment can be seen as an emotion regulation strategy to downregulate anger and increase positive emotions. Whereas for adults retaliating against a violator feels satisfying, particularly in second-party situations (de Quervain et al, 2004;Strobel et al, 2011), Arini, Wiggs, andKenward (2021) showed that 7-to 11-year-olds derived only small to medium levels of enjoyment when punishing violators in third-party situations and Marshall et al (2021, supplementary material) found that 5-to 7-year-olds reported more happiness and excitement and less sadness when they did not punish. Social norms as to how one should act on or regulate one's anger might affect whether and how children, adolescents, and adults engage in costly punishment of unfairness.…”