An international team of psychologists and philosophers present the latest research into the fascinating cognitive phenomenon of "joint attention." Some time around their first birthday most infants begin to engage in a behaviour that is designed to bring it about--say, by means of pointing or gaze-following--that their own and another person's attention are focused on the same object. Described as manifestations of an emerging capacity for joint attention, such triangulations between infant, adult and the world are often treated as a developmental landmark and have become the subject of...