Fair sharing is just caring: Links between justice sensitivity and distributive behavior in middle childhood.

Justice sensitivity (JS), the tendency to perceive and adversely respond to injustice, was related to prosocial behavior in different age groups and to distributive preferences in adults. To test influences of JS on sharing and distributive preferences, middle childhood as an important phase for moral development may be particularly interesting. We asked 1320 5- to 12-year-old children (M = 8.05 years, SD = 1.02; 51.2 % girls, 1.3 % transgender and gender-nonconforming) to read five vignettes that made salient the different principles of distributive justice (equality, merit, and need) and to distribute imaginary sweets between themselves and one described child (sharing) or between two described children (distributing). Children also rated their JS, and parents rated children's theory of mind (ToM) abilities and empathy. More concerns for justice for the self (victim JS) predicted distributions following the merit principle and a preference for need over equality and merit when forced to choose among the three. Caring for justice for others (altruistic JS) predicted more sharing, equal distributions, less distributions according to the merit principle, and a preference for equal distributions over merit and need when forced to choose among the three. These associations prevailed when ToM and empathy were included as control variables. The findings underline the importance of justice-related personality traits, such as JS, for moral development in middle childhood.

Links between justice sensitivity and moral reasoning, moral emotions, and moral identity in middle childhood.

Associations between moral-related traits, such as justice sensitivity (JS), the tendency to negatively respond to injustice, and moral development are largely unknown. From May to December 2018, 1329 5- to 12-year-olds (M = 8.05, SD = 1.02; 51.2% girls, 1.3% transgender and gender-nonconforming) from Germany rated their JS, moral reasoning, emotions, and identity; parents and teachers rated children's theory of mind (ToM) and empathy. Victim JS (caring for own justice) predicted more attributions of positive emotions to norm transgressors in structural equation models (ß = .295). Altruistic JS (caring for other's justice) predicted less attributions of positive emotions (ß = -.343) and a stronger moral identity (ß = .392) unless ToM was considered. Particularly altruistic JS showed associations with advanced moral development. Hence, moral-related traits deserve more attention by moral-development research.

Justice Sensitivity in Middle Childhood: Measurement and Location in the Temperamental and Social Skills Space.

Research suggested that justice sensitivity (JS)-the tendency to perceive and negatively respond to injustice-may already manifest in middle childhood, but empirical evidence is sparse. We, therefore, examined the measurement of JS in this age range and its associations with prosocial behavior, aggressive behavior, temperamental traits, and social skills. We had 361 children between 6 and 10 years of age and/or their parents rate the children's JS and its potential correlates. We replicated the JS-factor structure with three correlated subscales in both child and parent-ratings that showed strict measurement invariance. In line with previous findings in older age groups, victim JS positively predicted aggressive and negatively predicted prosocial behavior, whereas observer and perpetrator JS positively predicted prosocial and perpetrator JS negatively predicted aggressive behavior. The JS perspectives showed expected links with temperamental traits. All three subscales were positively related to empathy and theory of mind, but victim JS was negatively related to affective self-regulation. Findings suggest that interpersonal differences in JS may reliably and validly be measured in middle childhood and that JS is associated with aggressive and prosocial behavior already in childhood. Thus, future research should consider the role of JS for moral and personality development and developmental psychopathology.