Two studies with 9-, 11- and 13-month-old infants were conducted to investigate infants' ability to use an object's material properties to guide their object-directed actions. In study 1, 9- and 11-month-old infants played in an exploration phase with two objects made of different materials, one very heavy and the other one light and playable.…

Reports that infants in the second year of life can attribute false beliefs to others have all used a "search" paradigm in which an agent with a false belief about an object's location searches for the object. The present research asked whether 18-month-olds would still demonstrate false-belief understanding when tested with a novel "non-search"…

Experiments presented indicate that perseverative error in year-old infants cannot simply be a memory problem. Possible explanations are examined. (Author/ED)

Twenty-five one-year-olds were administered two tasks (each of which consisted of a familiarization stage followed by a recognition stage) in order to determine whether infants can recognize the shapes of objects by touch alone. (CM)

Infants ranging from 6 to 12 months were randomly assigned to one of three conditions: (1) allowed to look at a specified object, (2) allowed to look at and manipulate it, or (3) allowed to look at the object and to manipulate the transparent box in which it was encased. (JMB)