Bahill A T, McDonald J D
Vision Res. 1983;23(12):1573-83. doi: 10.1016/0042-6989(83)90171-2.
The human smooth pursuit eye movement system has a latency of about 150 msec. However, this study shows that humans can learn to perform zero-latency tracking of targets that move with continuous velocity and amplitude-limited acceleration. Superposition of eye velocity and target velocity records, for our unique target waveforms, demonstrated that the subject was using the correct waveform and not just approximating it with a sinusoid or some other simple waveform. Calculation of the mean square error between target and eye position gave a quantitative measure of how well the human can track. The mean square error between target and eye position was 0.32 deg2 for one thousand seconds of steady-state tracking by seven subjects. For several cycles at a time all subjects were able to reduce this error to less than 0.1 deg2.
人类的平稳跟踪眼球运动系统的潜伏期约为150毫秒。然而，这项研究表明，人类能够学会对以恒定速度和有限加速度运动的目标进行零潜伏期跟踪。对于我们独特的目标波形，眼球速度和目标速度记录的叠加表明，受试者使用的是正确的波形，而不仅仅是用正弦波或其他简单波形来近似它。计算目标与眼球位置之间的均方误差，可定量衡量人类的跟踪能力。7名受试者在1000秒的稳态跟踪中，目标与眼球位置之间的均方误差为0.32度²。一次几个周期内，所有受试者都能够将该误差降低到小于0.1度²。
