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绕过障碍物的计算要求较高的任务时顺序效应的重要性。初步实验结果显示，避障效果显着。具体来说，当有障碍物和无障碍物试验混合在一组到达试验中时，无障碍物试验中的手部路径比在不存在障碍物时执行相同动作的参与者的手部路径更加弯曲。这种顺序效应被称为障碍持续效应（OP），被认为是由于感知运动系统在某些条件下无法从执行避障运动切换到非避障运动所致。在三个拟议的实验中，将操纵试验之间的时间、障碍物大小和可能目标位置的数量。对这些变量的操作将被执行以获得进一步的行为数据，这将有助于识别 OP 效应的来源。这些信息不仅可以揭示避障行为的控制，还可以帮助我们理解避障行为。它还将有助于更好地理解感知运动系统的总体运作方式。