Zhang Sherry, Morrison Jack, Wang Wei, Greene Ernest
Department of Psychology, University of Southern California, Los Angeles, CA 90007, United States of America.
Neuropsychology Foundation, Sun Valley, CA 91353, United States of America.
AIMS Neurosci. 2022 Dec 12;9(4):491-515. doi: 10.3934/Neuroscience.2022028. eCollection 2022.
Shapes can be displayed as parts but perceived as a whole through feedforward and feedback mechanisms in the visual system, though the exact spatiotemporal relationships for this process are still unclear. Our experiments examined the integration of letter fragments that were displayed as a rapid sequence. We examined the effects of timing and masking on integration, hypothesizing that increasing the timing interval between frames would impair recognition by disrupting contour linkage. We further used different mask types, a full-field pattern mask and a smaller strip mask, to examine the effects of global vs local masking on integration. We found that varying mask types and contrast produced a greater decline in recognition than was found when persistence or mask density was manipulated. The study supports prior work on letter recognition and provides greater insight into the spatiotemporal factors that contribute to the identification of shapes.
形状可以部分呈现，但通过视觉系统中的前馈和反馈机制被感知为一个整体，尽管这一过程的确切时空关系仍不清楚。我们的实验研究了以快速序列呈现的字母片段的整合情况。我们研究了时间安排和掩蔽对整合的影响，假设增加帧之间的时间间隔会通过破坏轮廓连接而损害识别。我们还使用了不同类型的掩蔽，即全场图案掩蔽和较小的条形掩蔽，来研究全局掩蔽与局部掩蔽对整合的影响。我们发现，与操纵持续时间或掩蔽密度时相比，改变掩蔽类型和对比度会导致识别率下降得更多。该研究支持了先前关于字母识别的工作，并为有助于形状识别的时空因素提供了更深入的见解。
