Allenmark Fredrik, Hsu Yi-Fang, Roussel Cedric, Waszak Florian
Université Paris Descartes, Sorbonne Paris Cité, Paris, France & Centre National de la Recherche Scientifique (CNRS; Laboratoire Psychologie de la Perception, UMR 8242), Paris, France.
Université Paris Descartes, Sorbonne Paris Cité, Paris, France & Centre National de la Recherche Scientifique (CNRS; Laboratoire Psychologie de la Perception, UMR 8242), Paris, France; Department of Educational Psychology and Counselling, National Taiwan Normal University, 10610 Taipei, Taiwan.
Brain Res. 2015 Nov 11;1626:211-7. doi: 10.1016/j.brainres.2015.03.030. Epub 2015 Mar 26.
Repetition priming refers to the change in the ability to perform a task on a stimulus as a consequence of a former encounter with that very same item. Usually, repetition results in faster and more accurate performance. In the present study, we used a contrast discrimination protocol to assess perceptual sensitivity and response bias of Gabor gratings that are either repeated (same orientation) or alternated (different orientation). We observed that contrast discrimination performance is worse, not better, for repeated than for alternated stimuli. In a second experiment, we varied the probability of stimulus repetition, thus testing whether the repetition effect is due to bottom-up or top-down factors. We found that it is top-down expectation that determines the effect. We discuss the implication of these findings for repetition priming and related phenomena as sensory attenuation. This article is part of a Special Issue entitled SI: Prediction and Attention.
重复启动效应是指由于之前遇到过相同的刺激物，从而导致执行与该刺激物相关任务的能力发生变化。通常情况下，重复会带来更快、更准确的表现。在本研究中，我们采用对比辨别实验方案，来评估重复（相同方向）或交替（不同方向）呈现的Gabor光栅的感知灵敏度和反应偏差。我们观察到，与交替呈现的刺激相比，重复呈现的刺激的对比辨别表现更差，而非更好。在第二个实验中，我们改变了刺激重复的概率，以此检验重复效应是由自下而上还是自上而下的因素导致的。我们发现，是自上而下的期望决定了这一效应。我们讨论了这些发现对于重复启动效应及诸如感觉衰减等相关现象的意义。本文是名为“SI：预测与注意”的特刊的一部分。
