Visual control of braking: a test of the tau hypothesis.
Visual control of braking: a test of the tau hypothesis.
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DOI：
10.1037//0096-1523.21.5.996
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发表时间：
1995-10
期刊：
影响因子：
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通讯作者：
E. Yilmaz;William H. Warren
中科院分区：
文献类型：
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作者：
E. Yilmaz;William H. Warren
制动期间的减速可以通过以下方式控制：（a）使用相对于τ点（D. N.）的-0.5裕度值的相对光学膨胀率的时间导数; Lee，1976）或（B）从空间变量计算所需的减速度（即，感知的距离、速度或对象大小）。参与者观看了接近物体的闭环显示，并通过制动器调节了他们的减速。该物体出现在棋盘状地面上（提供速度，距离和大小信息）或没有背景（仅提供光学扩展）。制动期间的平均τ点为-0.51，基于制动调整的τ点临界值的估计值为-0.44和-0.52，接近预期值。地面或物体大小没有总体影响。结果与τ点策略一致，其中制动调整的方向和幅度使用τ点进行调节。
Deceleration during braking could be controlled by (a) using the time derivative of the relative rate of optical expansion, relative to a -0.5 margin value of tau-dot (D.N. Lee, 1976) or (b) computing the required deceleration from spatial variables (i.e., perceived distance, velocity, or object size). Participants viewed closed-loop displays of approach to an object and regulated their deceleration with a brake. The object appeared on a checkerboard ground surface (providing velocity, distance, and size information) or with no background (providing only optical expansion). Mean tau-dot during braking was -0.51, and estimates of the critical value of tau-dot based on brake adjustments were -0.44 and -0.52, close to the expected value. There were no overall effects of the ground surface or object size. The results are consistent with a tau-dot strategy, where the direction and magnitude of brake adjustments are regulated using tau-dot.