Onset rivalry: brief presentation isolates an early independent phase of perceptual competition.
Onset rivalry: brief presentation isolates an early independent phase of perceptual competition.
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开始竞争：简短的介绍隔离了感知竞争的早期独立阶段。
DOI：
10.1371/journal.pone.0000343
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发表时间：
2007-04-04
期刊：
影响因子：
3.7
通讯作者：
Cavanagh, Patrick
中科院分区：
文献类型：
--
作者：
Carter, Olivia;Cavanagh, Patrick
当左眼和右眼同时呈现不同的图像时，观察者通常仅报告对一个图像的排他性意识。这种现象被称为双眼竞争，反映了这样一个事实，即在一个无限期持续的感知竞争周期中，占主导地位的图像每隔几秒钟就会交替出现。尽管感知切换具有明显的连续性，但我们现在证明，最初的“开始”时期与所有后续的竞争时期有根本不同。使用简短的间歇性介绍，竞争优势表现出强烈的偏见，使相同的目标被认为与每个连续的刺激发作。这些偏差在任何给定位置内保持一致，但在整个视野中变化，其分布在多个星期内是稳定的，但在观察者之间具有高度特异性。然而，如果在任何位置的呈现时间超过10.1秒，则持续的双眼竞争的非常不同和更平衡的交替变得明显。这些强大的发病偏见观察到短暂的间歇性介绍在一个单一的位置或连续平滑运动的目标。期间的适应竞争对手的目标之一，诱导当地开关的优势，非适应的目标。然而，这些影响一般仅限于适应的空间位置，对目标的每个后续周期的影响较小。我们的结论是，发病竞争是独立的持续竞争，并不能解释当地地区的单眼优势或记忆过去的感知历史，而是反映了低层次的，空间局部化的因素，是稳定的几个星期。这些研究结果表明，简短的演示范式是不合适的，他们目前使用的机制的研究持续竞争。然而，简短的陈述是研究知觉竞争早期阶段的理想选择。
When the left and right eyes are simultaneously presented with different images, observers typically report exclusive awareness of only one image. This phenomenon is termed binocular rivalry, reflecting the fact that the dominant image alternates every few seconds in a cycle of perceptual competition that continues indefinitely. Despite the apparent continuity in perceptual switching, we now demonstrate that the initial “onset” period is fundamentally different to all subsequent rivalry epochs. Using brief intermittent presentations, rivalry dominance shows strong biases such that the same target is perceived with each successive stimulus onset. These biases remain consistent within any given location, but vary across the visual field in a distribution that is stable over multiple weeks but highly idiosyncratic across observers. If the presentation exceeds ∼1sec at any location, however, the very different and much more balanced alternations of sustained binocular rivalry become apparent. These powerful onset biases are observed with brief intermittent presentations at a single location or with continual smooth motion of the targets. Periods of adaptation to one of the rivaling targets induced local switches in dominance to the non-adapted target. However, these effects were generally limited to the spatial site of adaptation and had less influence over each subsequent cycle of the target. We conclude that onset rivalry is independent of sustained rivalry and cannot be explained by local regions of monocular dominance or memory of past perceptual history, but rather reflects low-level, spatially localized factors that are stable over periods of weeks. These findings suggest that brief presentation paradigms are inappropriate for their current use in studies of the mechanisms underlying sustained rivalry. However, brief presentations are ideal for investigating early stages of perceptual competition.
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影响因子：
9.2
作者：
Chen, XC;He, S
通讯作者：
He, S
影响因子：
1.8
作者：
Hupé, JM;Rubin, N
通讯作者：
Rubin, N
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WOLFE, JM
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WOLFE, JM
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Clifford, CWG
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