Goal-directed grasping: The dimensional properties of an object influence the nature of the visual information mediating aperture shaping

► Behavioral and neuroimaging studies of grasping have used 2D objects as a proxy for 3D objects. ► We examined whether the grasping of 2- and 3D objects elicit a comparable or dissociable adherence to Weber's law. ► 2D objects produced a continuous adherence to Weber's law whereas 3D objects did not. ► Distinct visual metrics support the grasping of 2D (relative) and 3D (absolute) objects.