Department of Psychology and Center for Brain and Cognitive Sciences, School of Education, Guangzhou University, China; Bioinformatics and BioMedical Bigdata Mining Laboratory, Department of Medical Informatics, School of Biology and Engineering, Guizhou Medical University, China.
Department of Psychology and Center for Brain and Cognitive Sciences, School of Education, Guangzhou University, China.
Int J Psychophysiol. 2023 Nov;193:112246. doi: 10.1016/j.ijpsycho.2023.112246. Epub 2023 Sep 20.
Previous evidence has shown that the contents of working memory (WM) can bias visual selection. However, not much is known about how WM effects change when the WM representation is held in different prioritization states. Here, we investigated this problem using event-related potentials. Subjects maintained two colors in WM while performing a search task. One of the colors was retro-cued, indicating that it was 80 % likely to be the target of the memory test. During the search display, one of the distractors was a salient color singleton, and this singleton distractor could carry the same color as the cued WM representation, the uncued WM representation, or be irrelevant to the memory content. Behaviorally, the memory test performance was found to be better for the cued color than for the uncued color, and we observed lower search accuracy (ACC) and longer search reaction time (RT) when the singleton distractor matched the cued WM representation than when it matched an uncued or an irrelevant WM representation. Event-related potential (ERP) data showed that the P3 amplitude of cue-color distractor conditions was smaller than that of uncued-color distractor conditions and irrelevant-color distractor conditions. These findings clearly indicate that prioritizing an item for enhanced representational quality enables the item to bias attention to a greater extent.
先前的证据表明，工作记忆（WM）的内容可以影响视觉选择。然而，对于 WM 表示处于不同优先级状态时，WM 效应如何变化，我们知之甚少。在这里，我们使用事件相关电位来研究这个问题。被试在执行搜索任务的同时在 WM 中保持两种颜色。其中一种颜色被回溯提示，这表明它有 80%的可能成为记忆测试的目标。在搜索显示期间，一个分心物是一个显著的颜色 singleton，这个 singleton 分心物可以与提示的 WM 表示、未提示的 WM 表示相同的颜色，或者与记忆内容无关。行为上，记忆测试的表现对于提示的颜色比未提示的颜色更好，并且当 singleton 分心物与提示的 WM 表示匹配时，我们观察到较低的搜索准确性（ACC）和更长的搜索反应时间（RT），而当它与未提示或不相关的 WM 表示匹配时。事件相关电位（ERP）数据显示，提示颜色-分心物条件的 P3 振幅小于未提示颜色-分心物条件和不相关颜色-分心物条件的 P3 振幅。这些发现清楚地表明，优先考虑一个项目以增强表示质量可以使该项目更有效地引导注意力。
