Rate of change of angular bearing as the relevant property in a horizontal interception task during locomotion
Rate of change of angular bearing as the relevant property in a horizontal interception task during locomotion
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DOI：
10.1080/00222890209601955
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发表时间：
2002-12-01
影响因子：
1.4
通讯作者：
Savelsbergh, GJP
中科院分区：
文献类型：
--
作者：
Lenoir, M;Musch, E;Savelsbergh, GJP
作者进行了3个实验，调查了接球手在移动过程中如何在拦截任务中处理球轨迹的水平分量。这些实验建立在这样一个发现的基础上，即速度适应是基于球相对于观察者的水平角位置或速度的变化(M.Lenoir，M.Janssens，E.Musch，E.Thiery，&J.Uyttenhove，1999)；描述了该策略的潜在潜在信息源。在实验一中，演员(N=10名参与者)和球沿着V形轨道的腿走近。当球的速度和初始角方位变化时，观察到的行为与使球的水平角速度为零相吻合：正或负角速度由速度变化来补偿。获得的证据表明，这些适应是由环境-行为者系统的关键变化而不是关键状态调节的。在实验2中，改变了头部和人工末端效应器之间的距离。无论距离如何，参与者(N=7)都会加速和减速，以保持球相对于末端执行器的角速度接近恒定。恒定方位角策略的生态相关性在实验3中得到了证实：该实验中的参与者(N=7)自由奔跑去接飞球。目前的结果支持这样一个概念，即一个人可以用有限的控制变量来解释参与者在自我运动过程中拦截任务中的行为。
The authors ran 3 experiments to investigate how catchers deal with the horizontal component of the ball's trajectory in an interception task during locomotion. The experiments were built upon the finding that velocity adaptations are based upon changes in the horizontal angular position or velocity of the ball with respect to the observer (M. Lenoir, M. Janssens, E. Musch, E. Thiery, & J. Uyttenhove, 1999); a potential underlying information source for that strategy is described. In Experiment 1, actor (N = 10 participants) and ball approached each other along the legs of a V-shaped track. When the velocity and the initial angular bearing of the ball were varied, the observed behavior fitted with nulling the horizontal angular velocity of the ball: A positive or negative angular velocity was compensated by a velocity change. Evidence was obtained that those adaptations are modulated by a critical change in, rather than by a critical state of, the environment-actor system. In Experiment 2, the distance between the head and an artificial end-effector was varied. Irrespective of that distance, participants (N = 7) accelerated and decelerated in order to keep the angular velocity of the ball with respect to the end-effector close to constant. The ecological relevance of that constant bearing angle strategy was confirmed in Experiment 3: Participants (N = 7) in that experiment freely ran to catch fly balls. The present results support the concept that one can explain with a limited number of control variables an actor's behavior in an interception task during self-motion.