Zhang Jiafeng, Ye Chaoxiong, Sun Hong-Jin, Zhou Jing, Liang Tengfei, Li Yuchen, Liu Qiang
Institute of Brain and Psychological Sciences.
Department of Psychology, Neuroscience and Behaviour.
J Exp Psychol Learn Mem Cogn. 2022 Sep;48(9):1235-1248. doi: 10.1037/xlm0001092. Epub 2021 Oct 25.
Memory representations can be stored in a passive state in a visual working memory (VWM) task. However, it remains unclear whether the representations stored in the passive state are prone to interference and decay. To explore this issue, we asked participants to successively remember two sets of memory items (M1 and M2) in three test manners: a (both M1 and M2 are probed simultaneously), a (probe M2 first and M1 second), or a (probe M1 first and M2 second). We found that the contralateral delay activity (CDA) amplitude after the onset of M2 only tracked M2 independently of M1 in the two (Experiments 1-3), and the accuracy of M1 was well above chance. These results implied that the M1 representations had been transferred from the online state into the passive state after the onset of M2. Furthermore, the accuracy of M1 (two representations were transferred from the online state into the passive state and retrieved later) in the was worse than M2 (2 representations in the online state throughout) in the (Experiments 1-2), but was comparable to M1 (two representations were transferred from the online state into the passive state and retrieved first) in the (Experiment 2). These results demonstrated that the memory representations were impaired during state switching. Importantly, once the representations had been stored in the passive state, they were robust with little memory loss during latent retention. (PsycInfo Database Record (c) 2022 APA, all rights reserved).
在视觉工作记忆（VWM）任务中，记忆表征可以以被动状态存储。然而，尚不清楚以被动状态存储的表征是否容易受到干扰和衰退。为了探究这个问题，我们要求参与者以三种测试方式先后记住两组记忆项目（M1和M2）：a（同时探测M1和M2）、b（先探测M2，再探测M1）或c（先探测M1，再探测M2）。我们发现，在M2出现后，对侧延迟活动（CDA）的幅度仅独立于M1追踪M2（实验1 - 3），并且M1的准确率远高于随机水平。这些结果表明，在M2出现后，M1表征已从在线状态转换为被动状态。此外，在b（实验1 - 2）中，M1（两个表征从在线状态转换为被动状态并稍后检索）的准确率低于M2（整个过程中两个表征处于在线状态），但在c（实验2）中与M1（两个表征从在线状态转换为被动状态并首先检索）相当。这些结果表明，记忆表征在状态转换过程中受到损害。重要的是，一旦表征以被动状态存储，它们在潜在保持期间具有很强的稳定性，几乎没有记忆损失。（PsycInfo数据库记录（c）2022美国心理学会，保留所有权利）
