CATCHING BALLS - HOW TO GET THE HAND TO THE RIGHT PLACE AT THE RIGHT TIME
CATCHING BALLS - HOW TO GET THE HAND TO THE RIGHT PLACE AT THE RIGHT TIME
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DOI：
10.1037/0096-1523.20.3.591
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发表时间：
1994-06-01
影响因子：
2.1
通讯作者：
BAKKER, FC
中科院分区：
文献类型：
--
作者：
PEPER, L;BOOTSMA, RJ;BAKKER, FC
在光学位移速度和光学膨胀速度的比率中，可以获得指定接近物体的未来通过距离的信息（以物体尺寸为单位）。尽管经验支持的假设，即物体的大小可以作为一个度量的感知传球距离，目前的一系列实验表明，在接球主体不依赖于这样的“点预测”的信息。（真实的和模拟的）球接近受试者的角度系统地影响了未来传球距离的口头和手动估计，以及接球动作的运动学特征。为了接球，演员使用瞬时动作相关信息，而不是时空估计。手的速度与指定当前所需速度的信息相适应。这确保了在正确的时间在正确的地点结束，无论这可能是在哪里。
Information specifying the future passing distance of an approaching object is available (in units of object size) in the ratio of optical displacement velocity and optical expansion velocity. Despite empirical support for the assumption that object size can serve as a metric in the perception of passing distance, the present series of experiments reveals that in catching a ball subjects do not rely on such ''point-predictive'' information. The angle at which (real and simulated) balls approached the subject systematically affected verbal and manual estimates of future passing distance, as well as the kinematic characteristics of catching movements. To catch a ball, the actor uses momentary action-related information instead of spatiotemporal estimates. The hand velocity is geared to information specifying the currently required velocity. This secures ending up at the right place in the right time, regardless of where this may be.