![]() For the 3D/2D condition, an experimenter demonstrated the action on the 3D object, and infants were given the opportunity to reproduce the action on a 2D touch-screen (and vice versa for the 2D/3D condition). Infants were then given the opportunity to imitate using the same screen or object. For the within-dimension conditions, an experimenter demonstrated an action by pushing a virtual button on a 2D screen or a real button on a 3D object. Infants were randomly assigned either to within-dimension (2D/2D or 3D/3D) or cross-dimension (3D/2D or 2D/3D) conditions. The present study employs a novel approach, using touch-screen technology to examine 15-month-olds’ transfer of learning. Infants learn less from a televised demonstration than from a live demonstration, the video deficit effect.
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