It's the cost that counts! Young children's reciprocity is sensitive to subjective cost

Trisha Katz1, Michael Tomasello1

  • 1Department of Psychology and Neuroscience, Duke University, Durham, NC, United States.

Child Development
|February 2, 2026
PubMed

Insights

Children

Area of Science:

  • Developmental psychology
  • Social cognition
  • Moral development

Background:

  • Reciprocity is a fundamental social behavior.
  • Understanding the development of reciprocity in children is crucial for social development research.
  • Previous research has not fully explored children's sensitivity to the benefactor's subjective valuation of a gift.

Purpose of the Study:

  • To investigate whether children's reciprocity is influenced by the benefactor's perceived cost or valuation of a gift.
  • To examine age-related differences in children's consideration of subjective costs in reciprocity.

Main Methods:

  • Three experiments were conducted with 192 children aged 4-7 years.
  • Participants' sharing and reward preferences were assessed in scenarios involving gifts with varying subjective valuations by the benefactor.
  • Age, gender, and racial demographics were recorded.

Main Results:

  • Six- and 7-year-olds, unlike 4- and 5-year-olds, preferred to reciprocate to benefactors who placed a higher subjective value on the gift.
  • Five-year-olds, but not 4-year-olds, understood that a benefactor's valuation of an object could influence sharing behavior.
  • Older children (6-7 years) demonstrated reciprocity even when their own valuation of the gift was lower, provided the benefactor had valued it highly.

Conclusions:

  • Children's reciprocity becomes increasingly sensitive to the benefactor's subjective costs and valuation of a gift with age.
  • This developmental shift suggests a growing understanding of others' perspectives in social exchange.
  • Findings highlight the nuanced development of prosocial behaviors and moral reasoning in early childhood.

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