At what age does group identity start to skew children's judgments?
Children as young as 4 to 6 years old already show signs that group membership colors their factual judgments about fairness. In a 2021 study of 120 children aged 4 to 10, researchers assigned kids to teams and then asked them to evaluate advantages that were either fair, unintentionally unfair, or intentionally unfair [1]. The 4- to 6-year-olds judged unintentionally unfair advantages as less acceptable when they came from an out-group member (someone on the other team) compared to an in-group member (their own teammate). This means that even young children were more forgiving of an unfair benefit when it helped their own group.
By age 6, a more sophisticated form of group-influenced judgment appears. A 2023 study of 236 Australian children aged 4 to 9 found that 4- and 5-year-olds based their moral judgments only on the actual outcome of a story (good or bad), but from age 6 onward, children also considered what choices the characters had available to them [2]. This shift suggests that older children use counterfactual thinking—imagining what could have happened—which is a key cognitive tool that can be biased by group identity.
How does group bias in judgment change as children get older?
As children move through elementary school, their group-based judgments become more nuanced and adult-like, but they don't disappear. In the same 2021 study, older children (7 to 10 years old) were more likely than younger ones to reference the intentions of the person who created an unfair advantage when explaining their judgments [1]. Younger children (4 to 6) focused more on how the behavior affected their team. This means that with age, children start to weigh both group loyalty and the reasons behind an action.
A 2023 study of 333 Australian 5- to 10-year-olds found that children's views on prejudice become increasingly differentiated with age [3]. Older children were more likely to say prejudice is unacceptable toward prosocial, vulnerable, or minority-group targets, but they still judged prejudice as 'okay' toward antisocial or negatively regarded targets. This shows that group-based judgments don't simply become fairer with age—they become more context-sensitive, mirroring adult social biases.
Does group identity affect moral judgments about fairness and forgiveness?
Yes, group identity clearly influences children's moral judgments about fairness, and this effect is measurable even in preschoolers. In a 2024 study of 46 children aged 3 to 5, researchers found age-related differences in moral judgment and the concept of forgiveness [5]. Most children in this age range were at a 'restitutional forgiveness' stage—meaning they thought forgiveness meant making things right—but their judgments varied depending on the situation. While this study didn't directly test group identity, it shows that moral judgment is developing rapidly in early childhood, which is exactly when group bias starts to appear.
A 2023 study of 272 Israeli children (136 Arab Muslim and 136 Jewish, ages 5 and 10) directly tested how priming group identity affects resource distribution [4]. When researchers highlighted a common identity (e.g., 'we are all residents of the same city'), children of both ethnicities showed more positive attitudes toward the other group. However, the effect of emphasizing in-group versus out-group identity differed between majority (Jewish) and minority (Arab) children, showing that group bias in judgment is shaped by real-world social status, not just age.
About These Sources
This answer is built on 5 peer-reviewed studies — published from 2021 to 2024, 1 from 2024 or later, 3 in Q1 journals — selected as the most relevant from 5 studies that passed quality screening, drawn from 43 papers retrieved from a database of over 500 million.
Sources used in this answer
Children’s group identity is related to their assessment of fair and unfair advantages
In a study of 120 children aged 4-10, out-group members viewed unintentional unfair and fair advantages as less acceptable than in-group members, but both groups were equally negative about intentional cheating; older children (7-10) referenced intentions more, while younger children (4-6) focused on team impact.
Counterfactual choices and moral judgments in children
In a study of 236 Australian children aged 4-9, 4- and 5-year-olds based moral judgments only on the actual outcome, but from age 6 onward, children also considered the counterfactual choices available to characters.
Children's judgments on the acceptability of prejudice
In a study of 333 Australian 5- to 10-year-olds, with age children increasingly showed anti-prejudice sentiments toward prosocial, vulnerable, and minority targets, but judged prejudice as 'okay' toward antisocial targets, showing nuanced adult-like biases.
Priming group identities affects children's resource distribution among groups
In a study of 136 Arab Muslim and 136 Jewish Israeli children aged 5 and 10, highlighting a common identity improved intergroup attitudes across all children, but the effect of in-group/out-group emphasis varied between majority and minority children.
A study on children's moral judgment and concept of forgiveness: Focusing on children’s age
In a study of 46 children aged 3-5, moral judgment and the concept of forgiveness differed by age, with most children at a 'restitutional forgiveness' stage, showing early development of moral reasoning.