Cross-fixation interactions of orientations suggest high-to-low-level decoding in visual working memory

Cross-fixation interactions of orientations suggest high-to-low-level decoding in visual working memory
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方向的交叉注视相互作用表明视觉工作记忆中的高水平到低水平的解码

DOI:
10.1016/j.visres.2021.107963
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发表时间:
2022
期刊:
影响因子:
1.8
通讯作者:
Qian, Ning
Qian, Ning
中科院分区:
心理学3区
文献类型:
--
作者:
Luu, Long;Zhang, Mingsha;Tsodyks, Misha;Qian, Ning

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感官编码(刺激如何引起感官反应)是已知的进展,从低到高层次的功能。解码(反应如何导致感知)鲜为人知,但通常被认为遵循相同的层次结构。因此,方位解码必须发生在低水平区域,如V1,没有交叉注视的相互作用。然而,Ding,Cueva,Tsodyks和Qian(2017)的一项研究提供了反对这一假设的证据,并提出视觉解码可能经常遵循工作记忆中的高到低层次结构,其中高到低层次的约束引入了低层次特征之间的相互作用。如果注视点两侧的两个方向都与任务相关并进入工作记忆,那么它们应该相互作用。我们确实发现了方向之间的预测交叉固定相互作用(排斥和相关性)。对照实验和分析排除了其他解释,如报告偏见和适应跨试验的同一侧的固定。此外,我们使用回顾性的高到低层次贝叶斯解码框架来解释数据。
Sensory encoding (how stimuli evoke sensory responses) is known to progress from low- to high-level features. Decoding (how responses lead to perception) is less understood but is often assumed to follow the same hierarchy. Accordingly, orientation decoding must occur in low-level areas such as V1, without cross-fixation interactions. However, a study, Ding, Cueva, Tsodyks, and Qian (2017), provided evidence against the assumption and proposed that visual decoding may often follow a high-to-low-level hierarchy in working memory, where higher-to-lower-level constraints introduce interactions among lower-level features. If two orientations on opposite sides of the fixation are both task relevant and enter working memory, then they should interact with each other. We indeed found the predicted cross-fixation interactions (repulsion and correlation) between orientations. Control experiments and analyses ruled out alternative explanations such as reporting bias and adaptation across trials on the same side of the fixation. Moreover, we explained the data using a retrospective high-to-low-level Bayesian decoding framework.
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