Triberti Stefano, Repetto Claudia, Costantini Marcello, Riva Giuseppe, Sinigaglia Corrado
Department of Psychology, Università Cattolica del Sacro Cuore, Milan, Italy.
Laboratory of Neuropsychology and Cognitive Neuroscience, Department of Neuroscience, Imaging and Clinical Sciences, University G. d'Annunzio, Chieti, Italy.
Exp Brain Res. 2016 Mar;234(3):799-806. doi: 10.1007/s00221-015-4446-y. Epub 2015 Dec 8.
Action and object are deeply linked to each other. Not only can viewing an object influence an ongoing action, but motor representations of action can also influence visual categorization of objects. It is tempting to assume that this influence is effector-specific. However, there is indirect evidence suggesting that this influence may be related to the action goal and not just to the effector involved in achieving it. This paper aimed, for the first time, to tackle this issue directly. Participants were asked to categorize different objects in terms of the effector (e.g. hand or foot) typically used to act upon them. The task was delivered before and after a training session in which participants were instructed either just to press a pedal with their foot or to perform the same foot action with the goal of guiding an avatar's hand to grasp a small ball. Results showed that pressing a pedal to grasp a ball influenced how participants correctly identified graspable objects as hand-related ones, making their responses more uncertain than before the training. Just pressing a pedal did not have any similar effect. This is evidence that the influence of action on object categorization can be goal-related rather than effector-specific.
动作与物体紧密相连。不仅观察物体能影响正在进行的动作，而且动作的运动表征也会影响物体的视觉分类。人们很容易认为这种影响是效应器特异性的。然而，有间接证据表明，这种影响可能与动作目标有关，而不仅仅与实现该目标所涉及的效应器有关。本文首次旨在直接解决这个问题。要求参与者根据通常用于作用于不同物体的效应器（如手或脚）对其进行分类。该任务在一次训练课程前后进行，在训练课程中，参与者要么被指示只用脚踩踏板，要么以引导虚拟角色的手抓住一个小球为目标进行相同的脚部动作。结果表明，踩踏板抓球会影响参与者如何正确地将可抓握物体识别为与手相关的物体，使他们的反应比训练前更加不确定。仅仅踩踏板并没有任何类似的效果。这证明动作对物体分类的影响可能与目标有关，而不是效应器特异性的。
