Sequential effects in obstacle avoidance

避障的顺序效应

• 批准号: 6737631
• 负责人: Steven Jax
• 金额: $ 2.02万
• 依托单位: PENNSYLVANIA STATE UNIVERSITY, THE
• 依托单位国家: 美国
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-12-15 至 2004-08-14
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6737631
• 关键词: body movement; clinical research; human subject; predoctoral investigator; psychomotor function

DESCRIPTION (provided by applicant): The goal of the present research is to demonstrate the importance of sequential effects when performing the computationally demanding task of reaching around obstacles. Results from a preliminary experiment showed significant sequential effects in obstacle avoidance. Specifically, when obstacle-present and non-obstacle trials were intermixed within a block of reaching trials, the handpaths in the non-obstacle trials were more curved than were handpaths from participants who performed the same movements when no obstacle was ever present. This sequential effect, called the obstacle-perseveration (OP) effect, is thought to be due to the perceptual-motor system's inability to switch from performing obstacle-avoiding movements to non-obstacle-avoiding movements under some conditions. In three proposed experiments, the time between trials, obstacle size, and number of possible target locations will be manipulated. Manipulation of these variables will be performed to obtain further behavioral data that will help identify the source(s) of the OP effect. Such information will not only shed light on the control of obstacle-avoidance behavior; it will also lead to a better understanding of how the perceptual-motor system operates in general.

描述(由申请人提供)：本研究的目标是证明在执行需要计算的绕过障碍物的任务时，顺序效应的重要性。初步实验结果显示，在避障过程中存在显著的顺序效应。具体地说，当有障碍和无障碍试验混合在一组到达试验中时，无障碍试验中的人行道比参与者在没有任何障碍的情况下进行相同动作的人行道更弯曲。这种顺序效应被称为障碍坚持(OP)效应，被认为是由于知觉-运动系统在某些条件下无法从执行避障动作切换到非避障动作。在三个拟议的实验中，试验之间的时间、障碍大小和可能的目标位置数量将被操纵。将对这些变量进行处理，以获得进一步的行为数据，这些数据将有助于确定OP效应的来源(S)。这些信息不仅将有助于控制避障行为，还将有助于更好地理解知觉-运动系统一般是如何运作的。