Department of Psychological Sciences, University of Liverpool, Liverpool, United Kingdom.
Dipartimento di Psicologia Generale, Università di Padova, Padova, Italy.
J Vis. 2024 Mar 1;24(3):1. doi: 10.1167/jov.24.3.1.
Previous work has found that feature attention can modulate electrophysiological responses to visual symmetry. In the current study, participants observed spatially overlapping clouds of black and white dots. They discriminated vertical symmetry from asymmetry in the target dots (e.g., black or white) and ignored the regularity of the distractor dots (e.g., white or black). We measured an electroencephalography component called the sustained posterior negativity (SPN), which is known to be generated by visual symmetry. There were five conditions with different combinations of target and distractor regularity. As well as replicating previous results, we found that an orthogonal axes of reflection in the distractor dots had no effect on SPN amplitude. We conclude that the visual system can processes reflectional symmetry in independent axis-orientation specific channels.
先前的研究发现，特征注意可以调节对视觉对称的电生理反应。在当前的研究中，参与者观察到黑色和白色点的空间重叠云。他们辨别目标点（例如黑色或白色）的垂直对称和非对称，并忽略分心点（例如白色或黑色）的规则性。我们测量了一种称为持续后负性（SPN）的脑电图成分，该成分已知是由视觉对称产生的。有五种不同的目标和分心规则组合的条件。除了复制以前的结果外，我们还发现分心点中的反射正交轴对 SPN 幅度没有影响。我们得出的结论是，视觉系统可以在独立的轴定向特定通道中处理反射对称。
