Phinney R E, Bowd C, Patterson R
Center for Molecular and Behavioral Neuroscience, Rutgers University, Newark, NJ 07102, USA.
Vision Res. 1997 Apr;37(7):865-9. doi: 10.1016/s0042-6989(96)00244-1.
This study employed a selective adaptation paradigm and investigated thresholds for direction discrimination of translational stereoscopic motion (moving binocular disparity information). The stimuli were moving arrays of randomly positioned stereoscopic discs created from disparity embedded in dynamic random-element stereograms. When discrimination thresholds were measured across a range of base directions following adaptation in a fixed direction, discrimination thresholds were maximally elevated 20-30 deg away from adaptation and reduced in the same direction as adaptation. These results are consistent with a distributed-channel model of direction coding and indicate that the direction of stereoscopic motion is encoded by adaptable direction-selective mechanisms similar to those proposed for luminance-defined motion.
本研究采用了选择性适应范式，研究了平移立体运动（移动双目视差信息）方向辨别阈值。刺激物是由动态随机元素立体图中嵌入的视差创建的随机定位立体圆盘的移动阵列。当在固定方向适应后，在一系列基本方向上测量辨别阈值时，辨别阈值在与适应方向相差20 - 30度处最大程度升高，并在与适应相同的方向上降低。这些结果与方向编码的分布式通道模型一致，并表明立体运动的方向是由类似于为亮度定义运动所提出的适应性方向选择机制编码的。
