Intention-Mediated Selective Helping in Infancy

One way to maintain cooperation between unrelated individuals and decrease the chance of providing costly aid to those who will not reciprocate is by selectively helping on the basis of the content of previous interactions. In the present study, we sought to determine whether the earliest instances of human helping behavior show specificity. In three experiments, we found that infants preferred to help an individual who, in a previous interaction, intended to provide a toy over one who did not (Experiment 1) and that infants consider this positive intention even without a positive outcome (Experiment 2). Experiment 3 provided a more detailed examination of the basis of selection, suggesting that infants are not solely avoiding unwilling individuals, but also selectively helping those who have shown a willingness to provide. Taken together, these experiments indicate that early helping behaviors show characteristics of the rich reciprocal relationships observed in adult prosocial behavior.

[1]  M. Tomasello,et al.  Unwilling versus unable: infants' understanding of intentional action. , 2005, Developmental psychology.

[2]  W. Hamilton,et al.  The evolution of cooperation. , 1984, Science.

[3]  M. Tomasello,et al.  The roots of human altruism. , 2009, British journal of psychology.

[4]  Armin Falk,et al.  A Theory of Reciprocity , 2001, Games Econ. Behav..

[5]  A. Woodward,et al.  Not all emotions are created equal: the negativity bias in social-emotional development. , 2008, Psychological bulletin.

[6]  A. Meltzoff Understanding the Intentions of Others: Re-Enactment of Intended Acts by 18-Month-Old Children. , 1995, Developmental psychology.

[7]  K. Wynn Constraints on natural altruism. , 2009, British journal of psychology.

[8]  J. Hamlin,et al.  Social evaluation by preverbal infants , 2007, Nature.

[9]  Katherine D. Kinzler,et al.  The native language of social cognition , 2007, Proceedings of the National Academy of Sciences.

[10]  C. Zahn-Waxler,et al.  5 – The Development of Altruism: Alternative Research Strategies , 1982 .

[11]  W. Hamilton The genetical evolution of social behaviour. I. , 1964, Journal of theoretical biology.

[12]  C. Boesch,et al.  Hunting behavior of wild chimpanzees in the Taï National Park. , 1989, American journal of physical anthropology.

[13]  Amanda L. Woodward,et al.  Infants track action goals within and across agents , 2007, Cognition.

[14]  Sarah F. Brosnan,et al.  A proximate perspective on reciprocal altruism , 2002, Human nature.

[15]  A. Woodward Infants selectively encode the goal object of an actor's reach , 1998, Cognition.

[16]  M. Tomasello,et al.  Altruistic Helping in Human Infants and Young Chimpanzees , 2006, Science.

[17]  D. Hay,et al.  Prosocial action in very early childhood. , 1999, Journal of child psychology and psychiatry, and allied disciplines.

[18]  D. Hay,et al.  Prosocial development. , 1994, Journal of child psychology and psychiatry, and allied disciplines.

[19]  V. Smith,et al.  Positive reciprocity and intentions in trust games , 2003 .

[20]  D. Hay The roots and branches of human altruism. , 2009, British journal of psychology.

[21]  Lori A. Roggman,et al.  Infant preferences for attractive faces: Rudiments of a stereotype? , 1987 .

[22]  W. Hamilton The genetical evolution of social behaviour. II. , 1964, Journal of theoretical biology.

[23]  U. Fischbacher,et al.  Social norms and human cooperation , 2004, Trends in Cognitive Sciences.

[24]  R. Trivers The Evolution of Reciprocal Altruism , 1971, The Quarterly Review of Biology.

[25]  D. Hay,et al.  Does Sharing Become Increasingly "Rational" in the Second Year of Life?. , 1991 .

[26]  M. Tomasello,et al.  Fourteen-through 18-month-old infants di eren-tially imitate intentional and accidental actions , 1998 .

[27]  L. Dugatkin Cooperation Among Animals: An Evolutionary Perspective , 1997 .