Fairness informs social decision making in infancy. 2018

Kelsey Lucca, and Jacqueline Pospisil, and Jessica A Sommerville
Department of Psychology, University of Washington, Seattle, Washington, United States of America.

The ability to reason about fairness plays a defining role in the development of morality. Thus, researchers have long been interested in understanding when and how a sensitivity to fairness first develops. Here, we examined infants' ability to use fairness information in selecting social partners. Using a novel experimental paradigm that combined pre-recorded stimuli with an active behavioral measure, we tested whether infants preferred to socially engage with an individual they had previously seen behave fairly or unfairly. After viewing an individual distribute goods to third parties either equally (i.e., 3:3 distribution) or unequally (i.e., 5:1 distribution), both 13- and 17-month-old infants selectively chose to engage in a social interaction with (i.e., take a toy from) an individual who distributed resources equally. The use of a novel paradigm to assess infants' fairness preferences demonstrates that infants' previously established fairness preferences extend across different, more demanding paradigms, and may therefore be more enduring in nature. Together, these findings provide new insights into the nature of infants' fairness representations, and fill in key gaps in the developmental timeline of infants' ability to use fairness information in their consideration of potential social partners. In sum, these findings build on previous research by demonstrating that infants not only hold an expectation that resources should be distributed fairly, they also preferentially interact with those who have previously done so. The early-emerging ability to both reason about and use fairness information may play an influential role in the development of complex prosocial behaviors related to morality more broadly.

UI MeSH Term Description Entries
D007223 Infant A child between 1 and 23 months of age. Infants
D007398 Interpersonal Relations The reciprocal interaction of two or more persons. Social Relationships,Husband-Wife Communication,Partner Communication,Communication, Husband-Wife,Communication, Partner,Husband Wife Communication,Husband-Wife Communications,Interpersonal Relation,Partner Communications,Relation, Interpersonal,Relationship, Social,Social Relationship
D008297 Male Males
D009014 Morals Standards of conduct that distinguish right from wrong. Morality
D002657 Child Development The continuous sequential physiological and psychological maturing of an individual from birth up to but not including ADOLESCENCE. Infant Development,Development, Child,Development, Infant
D003657 Decision Making The process of making a selective intellectual judgment when presented with several complex alternatives consisting of several variables, and usually defining a course of action or an idea. Credit Assignment,Assignment, Credit,Assignments, Credit,Credit Assignments
D005260 Female Females
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D012919 Social Behavior Any behavior caused by or affecting another individual or group usually of the same species. Sociality,Behavior, Social,Behaviors, Social,Social Behaviors
D018730 Infant Behavior Any observable response or action of a neonate or infant up through the age of 23 months. Behavior, Infant

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