BINOCULAR AND MONOCULAR STIMULI FOR MOTION IN DEPTH - CHANGING-DISPARITY AND CHANGING-SIZE FEED THE SAME MOTION-IN-DEPTH STAGE
BINOCULAR AND MONOCULAR STIMULI FOR MOTION IN DEPTH - CHANGING-DISPARITY AND CHANGING-SIZE FEED THE SAME MOTION-IN-DEPTH STAGE
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DOI：
10.1016/0042-6989(79)90205-0
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发表时间：
1979-01-01
期刊：
影响因子：
1.8
通讯作者：
BEVERLEY, KI
中科院分区：
文献类型：
--
作者：
REGAN, D;BEVERLEY, KI
虽然变大小刺激和变视差刺激都能在人体内产生深度运动的感觉，但它们在很大程度上是独立作用的。由大小变化引起的深度运动感觉可被拮抗性变视差刺激所抵消。通过检查改变大小的刺激而建立的深度运动后效可以通过改变大小的刺激或通过改变视差的刺激而无效。变化视差和变化大小作为深度运动感觉刺激的相对有效性变化如下：变化视差随着速度的增加而变得相对更有效（根据幂律）;随着检查时间的增加，变化视差变得相对更有效;随着目标的线性水平宽度的减小，变化视差变得相对更有效;改变视差和改变大小的相对有效性显示出显著的受试者间变异性（至少80：1）。相对有效性不取决于观察距离，除非在非常短的距离。改变差异的通道的存在（. ovrhdot..θ D）和变大小（≥ θ D）。θ S）为视觉系统提供了一种计算刺激的绝对线性宽度的可能手段，该绝对线性宽度与刺激的距离无关，因为线性宽度等于瞳孔间距乘以θ S。θ S/...θ D
Although changing-size stimulation and changing-disparity stimulation can both produce a sensation of motion in depth in humans, they act largely independently. The motion-in-depth sensation produced by changing-size can be cancelled by antagonistic changing-disparity stimulation. A motion-in-depth after-effect built up by inspecting a changing-size stimulus can be nulled either by changing-size stimulation or by changing-disparity stimulation. The relative effectiveness of changing-disparity and changing-size as stimuli for motion-in-depth sensation varies as follows: changing-disparity grows relatively more effective as velocity increases (according to a power law); changing-disparity grows relatively more effective as inspection time increases; changing-disparity grows relatively more effective as the linear horizontal width of the target decreases; the relative effectiveness of changing-disparity and changing-size shows marked intersubject variability (at least 80:1). Relative effectiveness does not depend on viewing distance except at very short ranges. The existence of channels for changing-disparity (.ovrhdot..theta.D) and changing-size (.ovrhdot..theta.S) provide the visual system with a possible means of computing the absolute linear width of a stimulus independently of its distance, since linear width equals interpupillary separation multiplied by .ovrhdot..theta.S/.ovrhdot..theta.D.