Kamphuisen Allard P, van Wezel Richard J A, van Ee Raymond
Utrecht University, Helmholtz Institute, PrincetonPlein 5, 3584CC Utrecht, The Netherlands.
Vision Res. 2007 Apr;47(9):1142-4. doi: 10.1016/j.visres.2007.01.016. Epub 2007 Mar 13.
Recent work investigated the influence of exogenous attention on initial percept dominance at the onset of binocular rivalry. It was reported that cueing attention to one of two binocularly presented transparent stimuli immediately prior to rivalrous viewing provided the cued stimulus with a competitive advantage in subsequent binocular rivalry. This effect was independent of the eye containing the cued stimulus during the rivalry phase. In this recent work, the attention cue was always presented to both eyes. This leaves unclear the extent to which cueing affects binocular and/or monocular stimulus representations. To disambiguate this issue, we compared the cueing strength when the cue was presented ipsi-, contra- or bi-laterally with respect to the eye containing the cued stimulus during subsequent binocular rivalry. Besides replicating previous findings, we found that stimulus cueing readily transfers across eyes, suggesting that binocular mechanisms mediate exogenous attention effects on dominance selection at the onset of binocular rivalry.
近期的研究探讨了外源性注意力对双眼竞争起始阶段初始知觉优势的影响。据报道,在竞争性观看之前,立即将注意力引导至双眼呈现的两个透明刺激之一,会使被提示的刺激在随后的双眼竞争中具有竞争优势。这种效应与竞争阶段中被提示刺激所在的眼睛无关。在这项近期的研究中,注意力提示总是同时呈现给双眼。这使得提示对双眼和/或单眼刺激表征的影响程度尚不清楚。为了厘清这个问题,我们比较了在随后的双眼竞争中,当提示相对于包含被提示刺激的眼睛同侧、对侧或双侧呈现时的提示强度。除了重复先前的研究结果外,我们还发现刺激提示很容易在双眼间传递,这表明双眼机制介导了外源性注意力对双眼竞争起始阶段优势选择的影响。