Paffen Chris L E, Van der Stigchel Stefan
Utrecht University, Utrecht, The Netherlands.
Atten Percept Psychophys. 2010 Jul;72(5):1237-43. doi: 10.3758/APP.72.5.1237.
Although it has been argued that visual attention and the dynamics of binocular rivalry are closely linked, strong evidence for this proposition is still lacking. Here, we investigate how perceptual alternations during binocular rivalry are affected by spatial attention by employing a cuing paradigm. We show a tight link between the occurrence of perceptual alternations and the spatiotemporal properties of visual attention: Alternations occurred earlier and more frequently at locations where visual attention was summoned by an exogenous cue. We argue that cuing a location where rival images are presented leads to a transient increase in the effective contrast of these rival images. This transient increase in effective contrast increases the probability of an alternation at that location. Furthermore, we suggest that an occipito-fronto-parietal network known to be involved in selective attention and binocular rivalry mediates perceptual alternations by boosting the neural response at attended locations.
尽管有人认为视觉注意力与双眼竞争的动态过程紧密相连，但这一观点仍缺乏有力证据。在此，我们通过采用线索提示范式，研究空间注意力如何影响双眼竞争期间的知觉交替。我们发现知觉交替的发生与视觉注意力的时空特性之间存在紧密联系：在外源性线索召唤视觉注意力的位置，交替出现得更早且更频繁。我们认为，提示呈现竞争图像的位置会导致这些竞争图像的有效对比度短暂增加。有效对比度的这种短暂增加会提高该位置出现交替的概率。此外，我们认为一个已知参与选择性注意力和双眼竞争的枕叶 - 额叶 - 顶叶网络通过增强被关注位置的神经反应来介导知觉交替。
