Time-to-contact estimation of accelerated stimuli is based on first-order information
Time-to-contact estimation of accelerated stimuli is based on first-order information
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DOI：
10.1037/0096-1523.29.6.1083
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发表时间：
2003-12-01
影响因子：
2.1
通讯作者：
Broderick, MP
中科院分区：
文献类型：
--
作者：
Benguigui, N;Ripoll, H;Broderick, MP
本研究的目的是测试一阶信息（不考虑加速度）是否用于（a）估计加速刺激在其轨迹的最后一部分闭塞后的接触时间（TTC）和（B）间接拦截具有投掷抛射体的加速刺激。这两个任务都需要根据刺激到达目标之前获得的预测信息来产生动作，并允许实验者对参与者使用（或不使用）一阶信息进行定量预测。结果表明，参与者不使用有关加速度的信息，他们犯的错误，定量依赖于一阶信息，即使加速度是心理检测。在间接拦截任务中，在运动开始前约200 ms计划行动，此时一阶TTC达到临界值。
The goal of this study was to test whether 1st-order information, which does not account for acceleration, is used (a) to estimate the time to contact (TTC) of an accelerated stimulus after the occlusion of a final part of its trajectory and (b) to indirectly intercept an accelerated stimulus with a thrown projectile. Both tasks require the production of an action on the basis of predictive information acquired before the arrival of the stimulus at the target and allow the experimenter to make quantitative predictions about the participants' use (or nonuse) of 1st-order information. The results show that participants do not use information about acceleration and that they commit errors that rely quantitatively on 1st-order information even when acceleration is psychophysically detectable. In the indirect interceptive task, action is planned about 200 ms before the initiation of the movement, at which time the 1st-order TTC attains a critical value.