Naito Tomoyuki, Sato Hiromichi, Osaka Naoyuki
Graduate School of Medicine, Osaka University, 1-17 Machikaneyama, Toyonaka 560-0043, Japan.
Vision Res. 2010 Aug 23;50(18):1862-6. doi: 10.1016/j.visres.2010.06.007. Epub 2010 Jun 15.
A number of previous studies have extensively investigated directional anisotropy in motion perception. However, consensus has not been reached regarding the nature of motion directional anisotropies in human vision. In this study, we investigated the directional anisotropy of human motion perception by moving random-dot stimuli in the peripheral upper visual field. Our findings show that the degree of directional anisotropy depends on the stimulus speed. Furthermore, the high and low speed conditions have preferred directions that are opposite. This may reflect differences in the directional information among temporal frequencies in natural scenes. These differences are thought to have crucial roles in the detection of motion direction.
此前已有多项研究广泛探讨了运动感知中的方向各向异性。然而，关于人类视觉中运动方向各向异性的本质尚未达成共识。在本研究中，我们通过在外周上视野中移动随机点刺激来研究人类运动感知的方向各向异性。我们的研究结果表明，方向各向异性的程度取决于刺激速度。此外，高速和低速条件下存在相反的偏好方向。这可能反映了自然场景中时间频率之间方向信息的差异。这些差异被认为在运动方向检测中起着关键作用。
