Children Demand an Equal Share of Worthless Objects

Colin Jacobs1, Sebastian Grueneisen2, Harriet Over3

  • 1University of California Berkeley, Berkeley, California, USA.

Developmental Science
|August 24, 2025
PubMed

Insights

Young children reject unfair treatment even when the unequal items are undesirable. This costly rejection of inequity suggests interpersonal concerns, not just material gain, drive fairness development in children.

Area of Science:

  • Developmental Psychology
  • Behavioral Economics
  • Social Neuroscience

Background:

  • Fairness development involves disadvantageous inequity aversion, where individuals sacrifice rewards to avoid unequal outcomes.
  • The equal respect hypothesis posits that children's fairness decisions are influenced by interpersonal concerns, not solely material considerations.

Purpose of the Study:

  • To investigate whether young children reject disadvantageous inequity when the unequal items are undesirable.
  • To determine if interpersonal factors, such as the distributor's reasoning, influence children's rejection of inequity.

Main Methods:

  • Three pre-registered experiments were conducted with 184 children aged 4-7 years.
  • Children's responses to unequal offers of undesirable objects were analyzed.
  • The impact of providing a reason for unequal distribution on children's rejection behavior was examined.

Main Results:

  • Children as young as 4 years old demonstrated aversion to unequal distributions of undesirable objects.
  • Children were willing to sacrifice high-value rewards to reject inequity involving undesirable objects.
  • The likelihood of refusing unequal offers of undesirable objects decreased when a reason for the disparity was provided.

Conclusions:

  • Interpersonal concerns significantly motivate the costly rejection of inequity, even when material consequences are negligible.
  • Children's fairness judgments are influenced by social and relational factors beyond simple material gain.
  • The findings support the equal respect hypothesis by highlighting the role of social motivations in early fairness development.

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