Chen Guangyu, Hatori Yasuhiro, Tseng Chia-Huei, Shioiri Satoshi
Graduate School of Information Sciences, Tohoku University, Sendai, Japan.
National Institute of Occupational Safety and Health, Tokyo, Japan.
J Vis. 2025 May 1;25(6):1. doi: 10.1167/jov.25.6.1.
This study investigates the size tuning of visual spatial attention using steady-state visual evoked potential (SSVEP) to understand how visual attention efficiently adapts and directs to specific spatial extents. Sixteen participants performed a task involving the rapid serial visual presentation of digits of varying sizes while their brain activity was monitored using electroencephalography. The stimuli flickered at different frequencies, and participants detected target digits at specified sizes. Analysis of SSVEP amplitudes and intertrial phase coherence revealed that visual attention exhibited size tuning with the maximum attentional modulation when the attended size matched the stimulus size. A difference of Gaussian function effectively modeled the facilitation around the attended size and inhibition for adjacent sizes. These findings suggest that visual attention can precisely adjust its focus to enhance processing efficiency, aligning with the zoom lens hypothesis. Our SSVEP study provides strong neural evidence underlying the adaptability of visual attention to varying spatial demands.
本研究利用稳态视觉诱发电位（SSVEP）来探究视觉空间注意的大小调谐，以了解视觉注意如何有效地适应并指向特定的空间范围。16名参与者执行了一项任务，其中涉及快速序列视觉呈现不同大小的数字，同时使用脑电图监测他们的大脑活动。刺激以不同频率闪烁，参与者检测指定大小的目标数字。对SSVEP振幅和试次间相位相干性的分析表明，当被注意的大小与刺激大小匹配时，视觉注意表现出大小调谐，且注意力调制最大。高斯差分函数有效地模拟了被注意大小周围的促进作用以及相邻大小的抑制作用。这些发现表明，视觉注意可以精确调整其焦点以提高处理效率，这与变焦透镜假说相符。我们的SSVEP研究为视觉注意对不同空间需求的适应性提供了有力的神经学证据。
