Determining whether a ball will land behind or in front of you:: Not just a combination of expansion and angular velocity
Determining whether a ball will land behind or in front of you:: Not just a combination of expansion and angular velocity
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DOI：
10.1016/j.visres.2005.09.002
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发表时间：
2006-02-01
期刊：
影响因子：
1.8
通讯作者：
Smeets, JBJ
中科院分区：
文献类型：
--
作者：
Brouwer, AM;L贸pez-Moliner, J;Smeets, JBJ
我们建议和评估的信息来源，接球手可能会使用，以确定是否一个球将土地背后或前面。它结合了对球的水平和垂直速度的估计。这些估计分别基于角膨胀率和垂直速度。我们的变数可以解释Oudejans等人[棒球经验对接住飞球动作起始的影响]的资料。Journal of Sports Sciences，15，587-595]，但这些数据也可以单独使用角膨胀来解释。因此，我们进行了额外的实验，在这些实验中，我们询问受试者，在角膨胀和垂直速度必须结合以获得正确反应的条件下，模拟球会落在哪里。受试者犯了系统性错误。我们发现了使用角速度的证据，但几乎没有任何使用角膨胀的迹象。因此，如果接球手使用一种策略，包括结合球的速度的垂直和水平估计，他们不获得他们的水平分量的估计，从膨胀率单独。(c)2005爱思唯尔有限公司保留所有权利。
We propose and evaluate a source of information that ball catchers may use to determine whether a ball will land behind or in front of them. it combines estimates for the ball's horizontal and vertical speed. These estimates are based, respectively, on the rate of angular expansion and vertical velocity. Our variable could account for ball catchers' data of Oudejans et al. [The effects of baseball experience on movement initiation in catching fly balls. Journal of Sports Sciences, 15, 587-595], but those data could also be explained by the use of angular expansion alone. We therefore conducted additional experiments in which we asked subjects where simulated balls would land under conditions in which both angular expansion and vertical velocity must be combined for obtaining a correct response. Subjects made systematic errors. We found evidence for the use of angular velocity but hardly any indication for the use of angular expansion. Thus, if catchers use a strategy that involves combining vertical and horizontal estimates of the ball's speed, they do not obtain their estimates of the horizontal component from the rate of expansion alone. (c) 2005 Elsevier Ltd. All rights reserved.