My research focuses on the role of evaluative processes in our everyday cognitions about the world. In particular, I examine our tendency to judge individuals’ actions as good or bad, as deserving of reward or punishment, and as morally praiseworthy or blameworthy. In addition, I ask whether and how these social and moral evaluations influence our understanding of others’ future acts, their mental states, and their underlying personalities. I examine these questions using preverbal infants and young toddlers, in order to study the foundational origins of these processes before complex cognitive abilities (such as language and inhibitory control) fully develop, and prior to the influences of cultural norms and values.
Kiley Hamlin is also part of the Early Development Research Group, a consortium of five research centers interested in the development of language, learning, and social understanding in infants and children.
Hamlin, J. K., Ullman, T., Tenenbaum, J., Goodman, N., & Baker, C., (in press). The mentalistic basis of core social cognition: experiments in preverbal infants and a computational model. DEVELOPMENTAL SCIENCE.
Hamlin, J. K., (in press). Nuanced social evaluation: Association doesn’t compute. In response to Scarf, D., Imuta, K., Colombo, M., & Hayne, H. The golden rule or valence matching? Methodological problems in Hamlin et. al. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED.
Hamlin, J. K., Mahajan, N., Liberman, Z., & Wynn, K., (in press). Not like me = bad: Infants prefer those who harm dissimilar others. PSYCHOLOGICAL SCIENCE.
Aknin, L., Hamlin, J. K., & Dunn, E., (2012). Giving leads to happiness in young children. Public Library of Science (PLoS ONE). 7(6).
Hamlin, J. K., & Wynn, K., (2012). Who knows what’s good to eat? Infants fail to match the food preferences of antisocial others. COGNITIVE DEVELOPMENT. 27(3), 227 – 239.
Hamlin, J. K., (2012). A developmental perspective on the moral dyad: A commentary on Gray, Young, & Waytz. PSYCHOLOGICAL INQUIRY. 23(2), 166 – 171.
Hamlin, J. K., Wynn K., Bloom, P., & Mahajan, N., (2011). How infants and toddlers react to antisocial others. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED. 108, 19931 – 19936.
Hamlin, J.K., & Wynn, K. (2011). Five- and 9-month-old infants prefer prosocial to antisocial others. Cognitive Development, 26, 30-39.
Hamlin, J.K., Wynn, K., & Bloom, P. (2010). 3-month-olds show a negativity bias in social evaluation. Developmental Science, 13(6), 923-939.
Hamlin, J.K., Newman, G., & Wynn, K. (2009). 8-month-old infants infer unfulfilled goals, despite ambiguous physical evidence. Infancy, 14(5), 579.
Hamlin, J. K., Wynn, K., & Bloom, P., (2008). Social evaluation by preverbal infants. PEDIATRIC RESEARCH. 63(3), 219 – 219.
Hamlin, J.K., Hallinan, E.V., & Woodward, A.L. (2008). Do as I do: 7-month old infants selectively reproduce others’ goals. Developmental Science, 11(4), 487-494.
Hamlin, J.K., Wynn, K., & Bloom, P. (2007). Social evaluation by preverbal infants. Nature, 450, 557-559.