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Detection of motion onset and offset: reaction time and visual evoked potential analysis

机译：运动开始和偏移的检测：反应时间和视觉诱发电位分析

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摘要

Manual reaction time (RT) and visual evoked potentials (VEP) were measured in motion onset and offset detection tasks. A considerable homology was observed between the temporal structure of RTs and VEP intervals, provided that the change in motion was detected as soon as the VEP signal has reached critical threshold amplitude. Both manual reactions and VEP rise in latency as the velocity of the onset or offset motion decreases and were well approximated by the same negative power function with the exponent close to ?2/3. This indicates that motion processing is normalised by subtracting the initial motion vector from ongoing motion. A comparison of the motion onset VEP signals in two different conditions, in one of which the observer was instructed to abstain from the reaction and in the other to indicate as fast as possible the beginning of the motion, contained accurate information about the manual response.
机译：在运动开始和偏移检测任务中测量了手动反应时间（RT）和视觉诱发电位（VEP）。只要在VEP信号达到临界阈值幅度后立即检测到运动变化，就可以在RT的时间结构和VEP间隔之间观察到相当的同源性。手动反应和VEP的延迟都随着开始或偏移运动的速度降低而增加，并且通过相同的负幂函数很好地近似，且指数接近λ2/ 3。这表明通过从正在进行的运动中减去初始运动矢量来对运动处理进行了归一化。在两种不同条件下的运动开始VEP信号的比较，其中一个被指示观察者放弃了反应，另一个被指示要尽可能快地指示运动的开始，其中包含了有关手动响应的准确信息。

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  • 来源
    《Psychological Research》 |2007年第6期|703-708|共6页
  • 作者

    Kairi Kreegipuu; Jüri Allik;

  • 作者单位

    University of Tartu and the ECBHS Tiigi 78 Tartu 50410 Estonia;

    University of Tartu and the ECBHS Tiigi 78 Tartu 50410 Estonia;

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