THE INFLUENCE OF PRE-MOVEMENT VISUAL INFORMATION ON MANUAL AIMING
THE INFLUENCE OF PRE-MOVEMENT VISUAL INFORMATION ON MANUAL AIMING
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DOI：
10.1080/14640748708401802
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发表时间：
1987-08-01
期刊：
影响因子：
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通讯作者：
MADALENA, J
中科院分区：
文献类型：
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作者：
ELLIOTT, D;MADALENA, J
进行了三个实验，以确定是否存在视觉遮挡后的运动环境，运动控制有用的视觉表示。在实验1中，受试者在五种不同的视觉条件下移动手写笔到小目标。与其他研究（例如Elliott和Allard，1985）一样，受试者在涉及全部视觉信息（灯光亮起）和灯光在运动开始时熄灭（灯光熄灭）的条件下向目标移动。 受试者还指出了目标的条件下，灯熄灭2，5和10秒前的运动开始。虽然在这个实验中获得了典型的开灯关灯的准确性差异（Keele和Posner，1968），但更引人注目的发现是指向延迟对运动准确性的影响。具体来说，受试者表现出的指向错误增加了两倍后，只有2秒的视觉遮挡运动开始之前。在实验2中，我们能够复制我们的2秒指向延迟效应与受试者之间的设计，提供证据表明，实验1中的结果是不是由于不对称的转移效应。在第三个实验中，通过使目标位置在所有关灯情况下可见来减少延迟效应。总之，研究结果提供了证据，证明存在一个简短的（< 2秒）的视觉表示的环境中有用的控制瞄准运动。
Three experiments were conducted to determine whether a visual representation of the movement environment, useful for movement control, exists after visual occlusion. In Experiment 1 subjects moved a stylus to small targets in five different visual conditions. As in other studies (e.g. Elliott and Allard, 1985), subjects moved to the targets in a condition involving full visual information (lights on) and a condition in which the lights were extinguished upon movement initiation (lights off). Subjects also pointed to the targets under conditions in which the lights went off 2, 5 and 10 sec prior to movement initiation. While typical lights-on-lights-off differences in accuracy were obtained in this experiment (Keele and Posner, 1968), the more striking findings was the influence of the pointing delay on movement accuracy. Specifically, subjects exhibited a twofold increase in pointing error after only 2 sec of visual occlusion prior to movement initiation. In Experiment 2, we were able to replicate our 2-sec pointing delay effect with a between-subjects design, providing evidence that the results in Experiment 1 were not due to asymmetrical transfer effects. In a third experiment, the delay effect was reduced by making the target position visible in all lights-off situations. Together, the findings provide evidence for the existence of a brief (< 2 sec) visual representation of the environment useful in the control of aiming movements.