Anstis Stuart
Department of Psychology, UC San Diego, La Jolla, CA, USA.
Iperception. 2019 Sep 25;10(5):2041669519879178. doi: 10.1177/2041669519879178. eCollection 2019 Sep-Oct.
The flash-grab effect made a stationary flashing cross appear to jump back and forth through a distance of more than 2°. Observers were asked to move a cursor as quickly as possible on to this flashing target. All observers younger than 65 years, and 39% of those over 65 years, could do this without difficulty within 1 second to 2 seconds. But 61% of those over 65 years experienced uncertainty about the exact position of the target and took from 6 to 147 seconds to hit it-about 4 times longer than to hit an actually jumping cross. This loss of hand-eye coordination was probably perceptual, not motor.
闪光抓取效应使一个静止的闪烁十字看起来在超过2°的距离内来回跳动。观察者被要求尽快将光标移动到这个闪烁的目标上。所有65岁以下的观察者以及39%的65岁以上的观察者都能在1秒到2秒内毫无困难地做到这一点。但65岁以上的观察者中有61%对目标的确切位置感到不确定，他们花了6到147秒才击中目标，这大约是击中实际跳动十字所需时间的4倍。这种手眼协调能力的丧失可能是感知方面的，而非运动方面的。
