Action goal selection and motor planning can be dissociated by tool use
Action goal selection and motor planning can be dissociated by tool use
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DOI：
10.1016/j.cognition.2008.10.001
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发表时间：
2008-12-01
期刊：
影响因子：
3.4
通讯作者：
Roder, Brigitte
中科院分区：
文献类型：
--
作者：
Collins, Therese;Schicke, Tobias;Roder, Brigitte
眼或手动作的准备增强了即将到来的动作结束位置的视觉感知。动作对知觉影响的空间位置可以通过目标选择或运动规划来确定。我们使用了一个工具使用任务来分离这两个选项。被指示的目标位置是一个视觉目标，参与者用一个三角形手持工具的尖端指向这个目标。电机端点由使刀尖到达目标所需的最终指尖位置定义。我们通过视觉辨别任务测试了两个位置（工具尖端端点，运动端点）的感知表现。辨别能力在两个空间位置均有平行增强，但在附近和中间位置无平行增强，说明动作目标选择和运动规划都对视觉感知有促进作用。此外，我们的结果挑战了广泛持有的观点，即工具扩展了身体图式，并表明工具的使用增强了在工具操作过程中最相关的精确位置的感知：用于操作工具的身体部分和活动的工具尖端。(C) 2008 Elsevier B.V.版权所有
The preparation of eye or hand movements enhances Visual perception at the upcoming movement end position. The spatial location of this influence of action on perception could be determined either by goal selection or by motor planning. We employed a tool use task to dissociate these two alternatives. The instructed goal location was a visual target to which participants pointed with the tip of a triangular hand-held tool. The motor endpoint was defined by the final fingertip position necessary to bring the tool tip onto the goal. We tested perceptual performance at both locations (tool tip endpoint, motor endpoint) with a visual discrimination task. Discrimination performance was enhanced ill parallel at both spatial locations, but not at nearby and intermediate locations, suggesting that both action goal selection and motor planning contribute to visual perception. In addition, our results challenge the widely held view that tools extend the body schema and suggest instead that tool use enhances perception at those precise locations which are most relevant during tool action: the body part used to manipulate the tool, and the active tool tip. (C) 2008 Elsevier B.V. All rights reserved.