Grasping others' movements: Rapid discrimination of object size from observed hand movements.

ABSTRACT: During reach-to-grasp movements, the hand is gradually molded to conform to the size and shape of the object to be grasped. Yet the ability to glean information about object properties by observing grasping movements is poorly understood. In this study, we capitalized on the effect of object size to investigate the ability to discriminate the size of an invisible object from movement kinematics. The study consisted of 2 phases. In the first action execution phase, to assess grip scaling, we recorded and analyzed reach-to-grasp movements performed toward differently sized objects. In the second action observation phase, video clips of the corresponding movements were presented to participants in a two-alternative forced-choice task. To probe discrimination performance over time, videos were

SUBMITTER: Ansuini C 

PROVIDER: S-EPMC5051634 | biostudies-literature | 2016 Jul

REPOSITORIES: biostudies-literature