Transsaccadic identification of highly similar artificial shapes
Transsaccadic identification of highly similar artificial shapes
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DOI：
10.1167/9.4.28
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发表时间：
2009-01-01
影响因子：
1.8
通讯作者：
Verfaillie, Karl
中科院分区：
文献类型：
--
作者：
Demeyer, Maarten;De Graef, Peter;Verfaillie, Karl
每秒多次，视觉系统成功地在眼跳前和眼跳后知觉之间进行无缝转换。支持这一点的跨眼跳表征的性质通常被认为是稀疏和抽象的。然而，最近的研究表明，详细的视觉信息也会在扫视中传输。在这里，我们试图证实视觉细节对扫视后知觉的预览效应确实存在。我们给受试者呈现了高度相似的人造形状，前面有一致的、不一致的或没有预览。测量眼球后再认性能，而眼球前和眼球后刺激的对比度是独立操作的。结果表明，与无预览条件相比，一致预览条件下的眼球跳动后刺激的识别效果更好。不一致的预览导致了识别精度的损失，同时也带来了识别速度的好处。第二个实验表明，当刺激呈现被眼跳后视觉面具中断时，这些效应可以消失。我们的结论是，跨眼跳记忆中包含的视觉细节可以影响后眼跳知觉。此外，我们发现支持这一过程的跨扫视表征是与对比无关的，但后扫视对比通过其对信息可靠性的影响而影响其被使用的程度。
Multiple times per second, the visual system succeeds in making a seamless transition between presaccadic and postsaccadic perception. The nature of the transsaccadic representation needed to support this was commonly thought to be sparse and abstract. However, recent studies have suggested that detailed visual information is transferred across saccades as well. Here, we seek to confirm that preview effects of visual detail on postsaccadic perception do indeed occur. We presented subjects with highly similar artificial shapes, preceded by a congruent, an incongruent, or no preview. Postsaccadic recognition performance was measured, while the contrast of presaccadic and postsaccadic stimuli was manipulated independently. The results show that congruent previews provided a benefit to the recognition performance of postsaccadic stimuli, compared to no-preview conditions. Incongruent previews induced a recognition accuracy cost, combined with a recognition speed benefit. A second experiment showed that these effects can disappear when stimulus presentation is interrupted with a postsaccadic visual mask. We conclude that visual detail contained in transsaccadic memory can affect the postsaccadic percept. Furthermore, we find that the transsaccadic representation supporting this process is contrast-independent, but that postsaccadic contrast, through its effect on the reliability of information, can affect the degree to which it is employed.