The dynamics of bi-stable alternation in ambiguous motion displays:: a fresh look at plaids
The dynamics of bi-stable alternation in ambiguous motion displays:: a fresh look at plaids
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DOI：
10.1016/s0042-6989(02)00593-x
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发表时间：
2003-03-01
期刊：
影响因子：
1.8
通讯作者：
Rubin, N
中科院分区：
文献类型：
--
作者：
Hupé, JM;Rubin, N
对移动格子的长期观察导致了连贯性和透明度之间的双稳态交替。然而，大多数关于格子布的研究使用了简短的呈现和两种解释之间的2AFC，从而忽视了格子布知觉的动态方面。在其他领域，最明显的是双眼竞争，研究表明，双稳态交替的动力学揭示了对潜在机制的重要见解。在这里，我们发展了一些方法来研究格子图案感知的动力学。在持续1-5分钟的陈述中，观察者不断地表明他们的感知(连贯性或透明度)。从这些数据中得出了一致性感知的相对强度的两个衡量标准：C/[C+T]，即查看一致性所用的相对时间，以及RTTransp，即报告透明度的响应时间。这些指标相互独立，但又紧密相关，两者都显示出与格子参数操纵的系统性关系。此外，这两个指标对广泛的参数范围内的操纵很敏感，包括在简要介绍方法受到“天花板”和“地板”影响的范围内。我们的结论是，研究格子中的双稳定动力学可以提供关于运动整合和分割的新的和意想不到的发现。(C)2002爱思唯尔科学有限公司。保留所有权利。
Prolonged observations of moving plaids lead to bi-stable alternations between coherency and transparency. However, most studies of plaids used brief presentations and a 2AFC between the two interpretations, thus overlooking the dynamical aspect of plaid perception. In other domains, most notably binocular rivalry, it was shown that the dynamics of the bi-stable alternations reveal important insights about the underlying mechanisms. Here we develop methods to study the dynamics of plaid perception. Observers continually indicated their percept (coherency or transparency) during presentations that lasted 1-5 min. Two measures of the relative strength of the coherency percept were derived from those data: C/[C + T], the relative time spent seeing coherency, and RTtransp, the response time to report transparency. Those measures are independent of each other yet tightly correlated, and both show systematic relations to manipulations of plaid parameters. Furthermore, the two measures are sensitive to manipulations in wide parametric regimes, including ranges where brief-presentation methods suffer from "ceiling" and "floor" effects. We conclude that studying the dynamics of bi-stability in plaids can provide new and unsuspected findings about motion integration and segmentation. (C) 2002 Elsevier Science Ltd. All rights reserved.