Lateral ball interception: hand movements during linear ball trajectories
Lateral ball interception: hand movements during linear ball trajectories
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DOI：
10.1007/s00221-006-0671-8
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发表时间：
2007-03-01
影响因子：
2
通讯作者：
Michaels, Claire F.
中科院分区：
文献类型：
--
作者：
Arzamarski, Ryan;Harrison, Steven J.;Michaels, Claire F.
理解行为是如何协调的一部分是识别指导运动的信息。在接球时手臂够得着的情况下，由于接球过程中手部运动逆转的经验差异，这种识别变得复杂。雅各布斯和迈克尔斯（J Exp Psychol 32：443-458，2006）在一个球以弧线向下摆动的范例中发现了单侧反转;这涉及到一个特定的光学变量，即横向速度与膨胀速度的比率。Montagne等人（Exp Brain Res 129：87-92，1999）报告了当球沿沿着线性轨迹接近时的双侧反转，这涉及不同的可变的侧向球位置。这里报道的研究试图复制蒙塔涅等人。（Exp Brain Res 129：87-92，1999）的发现。在实验1中，参与者抓住球滚向他们在桌子上，在充分照明下使用单眼或双眼观看;在实验2中，参与者抓住发光球与发光手套在一个黑暗的房间，否则。使用Montagne et al.的（Exp Brain Res 129：87-92，1999）标准，我们在任何条件下都没有观察到运动逆转，尽管手运动的某些方面表明了横向球位置的相关性。实验3只要求被试指出视杆指向的位置，实验结果表明，横向位置效应是一种与截取无关的偏差。横向速度与扩张的比率似乎是解释横向拦截中手轨迹的更好变量。
Part of understanding how acts are coordinated is identifying the information that guides movements. In the case of catching a ball within arm's reach, that identification has been complicated by empirical disparities concerning hand-movement reversals during catching. Jacobs and Michaels (J Exp Psychol Hum 32: 443-458, 2006) found unilateral reversals in a paradigm in which balls swung down in an arc; this implicated a particular optical variable, the ratio of lateral velocity to expansion velocity. Montagne et al. (Exp Brain Res 129:87-92, 1999) reported bilateral reversals when balls approached along a linear trajectory, which implicated a different variable, lateral ball position. The research reported here attempted to replicate Montagne et al.'s (Exp Brain Res 129:87-92, 1999) findings. In Experiment 1, participants caught balls rolling toward them across a table, under full lighting using monocular or binocular viewing; in Experiment 2, participants caught luminous balls with a luminous glove in an otherwise dark room. Using Montagne et al.'s (Exp Brain Res 129:87-92, 1999) criterion, we observed no movement reversals in any condition, though some aspects of hand movements suggested the relevance of lateral ball position. The results of Experiment 3, which asked perceivers to indicate only where rods pointed, suggested that lateral position effects were a bias that is unrelated to interception. The ratio of lateral velocity to expansion appears to be a better variable for explaining hand trajectories in lateral interception.