Department of Experimental Psychology, Utrecht University, Utrecht, the Netherlands.
Department of Experimental Psychology, Utrecht University, Utrecht, the Netherlands.
Vision Res. 2020 Aug;173:1-6. doi: 10.1016/j.visres.2020.04.010. Epub 2020 May 18.
Subjectively, we experience a stable representation of the outside world across saccades. Although previous studies have reported that presaccadically acquired visual information influences postsaccadic perception, whether such information's priority to access visual awareness is either reset by each saccade or continuous across saccades remains unclear. To investigate this issue, we combined a breaking continuous flash suppression (b-CFS) with a saccade task. Before each saccade, a grating was presented in the peripheral visual field under suppression. After the saccade, the same grating was again presented under suppression at either the retinotopically matched, the spatiotopically matched, or a control location. By measuring the duration of the grating to break through CFS into awareness after a saccade, we could compare the breakthrough times across stimuli presented at the different locations. No difference in the reaction times between the spatiotopic and control location was observed, indicating that a saccade resets the buildup of an object's priority to access visual awareness. However, a longer breakthrough time was observed for the retinotopic as compared to the control location, suggesting that a form of retinotopic adaptation to the grating suppressed the priority to access visual awareness after a saccade.
从主观上看，我们在眼跳过程中能稳定地感知外部世界的表象。尽管先前的研究报告表明，眼跳前获取的视觉信息会影响眼跳后的感知，但这种信息是否优先进入视觉意识会在每次眼跳时被重置，或者在眼跳过程中持续存在，目前仍不清楚。为了研究这个问题，我们将打破连续闪光抑制（b-CFS）与眼跳任务相结合。在每次眼跳之前，在外周视觉场中呈现一个光栅，该光栅处于抑制状态。眼跳后，同样的光栅再次出现在与视网膜对应的位置、空间对应的位置或控制位置的抑制下。通过测量光栅在眼跳后突破 CFS 进入意识的持续时间，我们可以比较在不同位置呈现的刺激的突破时间。在空间位置和控制位置之间没有观察到反应时间的差异，这表明眼跳会重置物体进入视觉意识的优先级。然而，与控制位置相比，在视网膜位置观察到更长的突破时间，这表明在眼跳后，一种针对光栅的视网膜适应形式会抑制其进入视觉意识的优先级。
