Guttmann J, Spatz H C
Perception. 1985;14(1):5-12. doi: 10.1068/p140005.
Stereoscopic vision was investigated with an experimental design allowing dichoptic stimulus presentation at different frequencies of image alternation. For twenty subjects the frequency of binocular fusion and the frequency of loss of fusion to one stereoscopic image was measured as a function of the convergence angle. In thirteen subjects no dependence of the fusion frequency was found, while seven subjects showed a marked increase of the fusion frequency with increasing angle of convergence. In all cases the frequency of fusion was higher than the frequency of loss of fusion. Both frequencies, however, are lower than the flicker fusion frequency. Under conditions where no monocular cues and no references for stereoptic depth comparisons were presented, the apparent distance of the image from the observer could not be assessed, but perception of relative motion in depth was possible. All subjects assessed the direction of motion accurately down to changes of the convergence angle of 0.2 deg s-1.
采用一种实验设计对立体视觉进行了研究，该设计允许以不同的图像交替频率进行双眼刺激呈现。对于20名受试者，测量了双眼融合频率以及对一个立体图像失去融合的频率，并将其作为会聚角的函数。在13名受试者中，未发现融合频率存在依赖性，而7名受试者表现出随着会聚角增大融合频率显著增加。在所有情况下，融合频率都高于失去融合的频率。然而，这两个频率都低于闪烁融合频率。在没有单眼线索且没有用于立体深度比较的参考的情况下，无法评估图像与观察者的视在距离，但可以感知深度上的相对运动。所有受试者都能准确评估运动方向，直到会聚角变化为0.2度/秒。
