Unité de Recherche Conscience, Cognition & Computation, Université Libre de Bruxelles - CP 191, Avenue, F.D. Roosevelt, 50, Bruxelles, Belgium.
Conscious Cogn. 2010 Mar;19(1):152-71. doi: 10.1016/j.concog.2010.01.002. Epub 2010 Feb 8.
The goal of this study is to characterize observers' abilities to detect gradual changes and to explore putative dissociations between conscious experience of change and behavioral adaptation to a changing stimulus. We developed a new experimental paradigm in which, on each trial, participants were shown a dot pattern on the screen. Next, the pattern disappeared and participants had to reproduce it. In some conditions, the target pattern was incrementally rotated over successive trials and participants were either informed or not of this change. We analyzed both awareness of the changes and the dynamics of behavioral adaptation, in a way that makes it possible to assess both variability and accuracy as they change over time. Results indicate a dissociation between change awareness and behavioral adaptation to the changes, and support the notion that unconscious representations of visual stimuli are more precise and detailed than previously suggested. We discuss the implications of these results for theories of change detection.
本研究旨在描述观察者察觉渐变的能力，并探索对变化刺激的意识体验与行为适应之间可能存在的分离。我们开发了一种新的实验范式，在每次试验中，参与者在屏幕上看到一个点模式。接下来，图案消失，参与者必须复制它。在某些条件下，目标图案在连续的试验中逐渐旋转，参与者会或不会被告知这种变化。我们以一种可以评估随时间变化的可变性和准确性的方式，分析了对变化的意识和行为适应的动态。结果表明，变化意识和对变化的行为适应之间存在分离，并支持这样一种观点，即视觉刺激的无意识表示比之前认为的更精确和详细。我们讨论了这些结果对变化检测理论的意义。
