Attractive Serial Dependence in the Absence of an Explicit Task
Attractive Serial Dependence in the Absence of an Explicit Task
复制标题
DOI：
10.1177/0956797617737385
复制
发表时间：
2018-03-01
影响因子：
8.2
通讯作者：
Park, Joonkoo
中科院分区：
文献类型：
--
作者：
Fornaciai, Michele;Park, Joonkoo
吸引序列依赖是指感觉信息表征的适应性变化，由此当前刺激看起来与先前刺激相似。然而，这种现象的本质是有争议的，因为序列依赖可能源于有偏见的知觉表征或决策阶段工作记忆表征的有偏见的痕迹。在这里，我们展示了一个神经签名的串行依赖的数字感知出现在早期的视觉处理流，即使在没有一个明确的任务。此外，一项心理物理学实验表明，数字感知会受到先前呈现的刺激的吸引，而不是排斥适应。这些结果表明，序列依赖是一种感知现象，从视觉处理的早期水平开始，并独立于决策过程发生，这与这些偏见从神经信号中消除噪声以建立感知连续性的观点一致。
Attractive serial dependence refers to an adaptive change in the representation of sensory information, whereby a current stimulus appears to be similar to a previous one. The nature of this phenomenon is controversial, however, as serial dependence could arise from biased perceptual representations or from biased traces of working memory representation at a decisional stage. Here, we demonstrated a neural signature of serial dependence in numerosity perception emerging early in the visual processing stream even in the absence of an explicit task. Furthermore, a psychophysical experiment revealed that numerosity perception is biased by a previously presented stimulus in an attractive way, not by repulsive adaptation. These results suggest that serial dependence is a perceptual phenomenon starting from early levels of visual processing and occurring independently from a decision process, which is consistent with the view that these biases smooth out noise from neural signals to establish perceptual continuity.