Endogenous influences on perceptual bistability depend on exogenous stimulus characteristics
Endogenous influences on perceptual bistability depend on exogenous stimulus characteristics
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DOI：
10.1016/j.visres.2006.03.016
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发表时间：
2006-10-01
期刊：
影响因子：
1.8
通讯作者：
van Ee, Raymond
中科院分区：
文献类型：
--
作者：
Brouwer, Gijs Joost;van Ee, Raymond
研究了物理参数和任务对模糊旋转球体（SFM）的模糊感知的影响。增加点密度和速度减少知觉阶段的持续时间在被动观看和自愿控制行使。我们的主要发现是，知觉的自愿控制取决于构成刺激的物理参数。这种依赖性对调节自愿控制的机制产生了重要的限制，因为这些机制不能独立于刺激特征而运作。此外，局部不对称的点密度可以触发交替对最显着的方向，这是不一定与最大数量的点：在可持续森林管理的感知解释之间的竞争似乎发生在基于表面的表示，而不是个别元素之间。最后，我们表明，自愿控制仍然是有效的，即使注意跟踪个别刺激元素不再可能。(c)2006爱思唯尔有限公司保留所有权利。
We investigated the influence of changing physical parameters and task on bistable perception of an ambiguously rotating sphere (SFM). Increasing dot-density and velocity decreased the duration of perceptual phases during both passive viewing and voluntary control exertion. Our main finding is that voluntary control of perception depends on the physical parameters constituting the stimulus. This dependency places important constraints on the mechanisms mediating voluntary control as these mechanisms cannot operate independently of stimulus characteristics. In addition, local asymmetries in dot-densities can trigger alternations towards the most salient direction, which is not necessarily associated with largest number of dots: competition between perceptual interpretations during SFM appears to occur between surface-based representations rather than between individual elements. Finally, we show that voluntary control remains effective, even when attentive tracking of individual stimulus elements is no longer possible. (c) 2006 Elsevier Ltd. All rights reserved.