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“拥挤效应”被认为是外周视觉物体辨认过程中的一个重要瓶颈.它是指当目标被干扰子包围,在外周视野呈现时,观察者辨认目标的能力被大大削弱,尤其是当目标和干扰子之间存在某种相似性时.许多研究分别试图在不同层次上提出解释这一现象的机制.本文通过三个实验,使用了不同的视觉刺激图形的辨认任务(例如,三角形和箭头的朝向判断、数字和字母的辨认以及S形图形的朝向辨认),测量了目标和干扰子之间中心距离的阈值,结果一致地发现,当目标和干扰子之间存在拓扑性质差异(洞的个数差异)时,拥挤效应会显著降低,并且排除了目标和干扰子之间的主观相似性、形状和面积差异等可能的因素.从知觉组织的角度验证了当目标和干扰子之间存在拓扑性质差异时,拥挤效应会显著降低,这是首次发现的一个影响拥挤效应的新的维度.本文结果不仅为拥挤效应的机制提供了一个新的解释,也为大范围首先拓扑知觉在知觉物体形成中的作用提供了支持性证据.
The crowding effect is considered as an important bottleneck in the process of recognizing peripheral visual objects.It means that when the target is surrounded by interfering elements, the ability of the observer to recognize the target is greatly weakened when the peripheral visual field is presented, especially when the target And interferers, many studies have tried to propose mechanisms at different levels to explain this phenomenon.Through three experiments, different types of visual stimulus graphs were used to identify tasks (for example, triangles and arrows , The recognition of numbers and letters, and the orientation of S-shaped figures), the threshold of the center distance between the target and the interferer was measured and it was found consistently that there was a difference in topological properties between the target and the interferer (hole Number of discrepancies), the congestion effect will be significantly reduced, and the possible factors such as subjective similarity, shape and area difference between the target and the interfering subtotals are excluded.From the perspective of perceptual organization, it is verified that when the target and the interfering subunit exist When the topological property is different, the congestion effect will be significantly reduced, which is the first time that a new dimension of congestion effect is discovered.The results in this paper are not only for the congestion effect System provides a new explanation, but also for a wide range in the first perceptual perception topology role object formation provided supporting evidence.