Institute of Neuroscience, National Research Council, Pisa, Italy.
Centre for Synaptic Neuroscience and Technology, Italian Institute of Technology, Genova, Italy.
J Vis. 2022 Sep 2;22(10):1. doi: 10.1167/jov.22.10.1.
Perceptual history influences current perception, readily revealed by visual priming (the facilitation of responses on repeated presentations of similar stimuli) and by serial dependence (systematic biases toward the previous stimuli). We asked whether the two phenomena shared perceptual mechanisms. We modified the standard "priming of pop-out" paradigm to measure both priming and serial dependence concurrently. The stimulus comprised three grating patches, one or two red, and the other green. Participants identified the color singleton (either red or green), and reproduced its orientation. Trial sequences were designed to maximize serial dependence, and long runs of priming color and position. The results showed strong effects of priming, both on reaction times and accuracy, which accumulated steadily over time, as generally reported in the literature. The serial dependence effects were also strong, but did not depend on previous color, nor on the run length. Reaction times measured under various conditions of repetition or change of priming color or position were reliably correlated with imprecision in orientation reproduction, but reliably uncorrelated with magnitude of serial dependence. The results suggest that visual priming and serial dependence are mediated by different neural mechanisms. We propose that priming affects sensitivity, possibly via attention-like mechanisms, whereas serial dependence affects criteria, two orthogonal dimensions in the signal detection theory.
知觉历史会影响当前的知觉，这可以通过视觉启动（在重复呈现相似刺激时促进反应）和序列依赖（对先前刺激的系统偏见）很容易地揭示出来。我们想知道这两种现象是否共享知觉机制。我们修改了标准的“突显启动”范式，同时测量启动和序列依赖。刺激由三个光栅补丁组成，一个或两个是红色的，另一个是绿色的。参与者识别颜色的唯一选择（红色或绿色），并复制其方向。试验序列旨在最大限度地增加序列依赖和启动颜色和位置的长时间运行。结果表明，启动有很强的影响，无论是在反应时间还是准确性上，这在文献中通常都有报道。序列依赖效应也很强，但不依赖于先前的颜色，也不依赖于运行长度。在重复或改变启动颜色或位置的各种条件下测量的反应时间与方向再现的不准确性可靠相关，但与序列依赖的幅度可靠无关。结果表明，视觉启动和序列依赖是由不同的神经机制介导的。我们提出，启动影响敏感性，可能通过类似于注意力的机制，而序列依赖影响标准，这是信号检测理论中的两个正交维度。
