The promotive influence of positive moral emotions on prosocial behavior in 3–5‐year‐old children

Prosocial behaviour is a hallmark of social and emotional competence during childhood. Thus, promoting the development of children's prosocial behaviour can have important downstream benefits for individuals and society. Previous studies indicated that there is a positive effect of negative moral emotions on prosocial behaviour, but the influence of positive moral emotions on prosocial behaviour remains largely unknown. This study adopted three experiments to investigate the influence of positive moral emotions on three aspects of prosocial behaviour in 3–5‐year‐old children. After inducing positive moral emotions in children, they were observed either in helping (Experiment 1, N = 151, 75 boys), sharing (Experiment 2, N = 141, 69 boys) or comforting (Experiment 3, N = 132, 66 boys) scenarios. Results showed that: (1) children's helping, sharing and comforting behaviours in the moral emotions (experimental) group were significantly higher than those in the control group, suggesting that positive moral emotions could positively influence the examined prosocial behaviours; (2) there were age differences in children's helping, sharing and comforting, but the effect of positive moral emotions on the examined prosocial behaviours did not differ by age and gender. These findings point to the need for fostering positive moral emotions in early cultivation of children's prosocial behaviour during pre‐schooler education.