title: Infants' observation of tool-use events over the first year of life.
abstract: How infants observe a goal-directed instrumental action provides a unique window into their understanding of others' behavior. In this study, we investigated eye-gaze patterns while infants observed events in which an actor used a tool on an object. Comparisons among 4-, 7-, 10-, and 12-month-old infants and adults reveal changes in infants' looking patterns with age; following an initial face bias, infants' scan path eventually shows a dynamic integration of both the actor's face and the objects on which they act. This shift may mark a transition in infants' understanding of the critical components of tool-use events and their understanding of others' behavior.
authors: Department of Psychology and Learning Research and Development Center, University of Pittsburgh, Pittsburgh, PA 15260, USA. Electronic address: klaus.libertus@gmail.com.
authors: Klaus
authors: K
authors: Libertus
authors: Florida Atlantic University, USA.
authors: Marissa L
authors: ML
authors: Greif
authors: Department of Psychology and Human Development, Vanderbilt University, Nashville, TN 37203, USA.
authors: Amy Work
authors: AW
authors: Needham
authors: Autism and Neurodevelopmental Disorders Institute, The George Washington University and Children's National Health System, Washington, DC 20037, USA.
authors: Kevin
authors: K
authors: Pelphrey
mesh_terms: D000328:Adult; D000375:Aging / Q000502:physiology*; D032882:Comprehension / Q000502:physiology*; D005133:Eye Movements / Q000502:physiology*; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D019370:Observation
keywords: Attention; Event perception; Eye-tracking; Infants; Social cognition; Tool use