State anxiety reduces working memory capacity but does not impact filtering cost for neutral distracters.
State anxiety reduces working memory capacity but does not impact filtering cost for neutral distracters.
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DOI：
10.1111/psyp.13625
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发表时间：
2020-10
期刊：
影响因子：
3.7
通讯作者：
Larson, Christine L.
中科院分区：
文献类型：
--
作者：
Ward, Richard T.;Lotfi, Salahadin;Sallmann, Hannah;Lee, Han-Joo;Larson, Christine L.
目前的理论认为，焦虑会限制工作记忆能力并干扰与任务无关信息的有效过滤，从而对工作记忆（WM）产生不利影响。目前的研究调查了电击引起的状态焦虑对 WM 能力和过滤与任务无关的中性刺激的能力的影响。我们测量了对侧延迟活动 (CDA)，这是一种与事件相关的电位，用于索引 WM 中维护的项目数量，同时参与者完成侧化变化检测任务。该任务包括低和高 WM 负载，以及低负载加干扰条件。该设计用于评估低负荷和高负荷的 WM 能力，并研究个人过滤与任务无关的中性刺激的能力。参与者在两种条件下完成任务：电击威胁和安全威胁。我们观察到，与特定于高内存负载的安全条件相比，威胁中的 CDA 有所减少。然而，我们没有发现威胁和安全条件之间的 CDA 过滤成本有任何差异。此外，我们没有发现威胁和安全条件之间的行为表现有任何差异。这些发现表明，处于焦虑状态会减少 WM 中大量信息的神经表征，但对中性干扰因素的过滤几乎没有影响。
Current theories propose that anxiety adversely impacts working memory (WM) by restricting WM capacity and interfering with efficient filtering of task-irrelevant information. The current study investigated the effect of shock-induced state anxiety on WM capacity and the ability to filter task-irrelevant neutral stimuli. We measured the contralateral delay activity (CDA), an event-related potential that indexes the number of items maintained in WM, while participants completed a lateralized change detection task. The task included low and high WM loads, as well as a low load plus distracter condition. This design was used to assess WM capacity for low and high loads and investigate an individual’s ability to filter neutral task-irrelevant stimuli. Participants completed the task under two conditions, threat of shock and safe. We observed a reduced CDA in the threat compared to the safe condition that was specific for high memory load. However, we did not find any differences in CDA filtering cost between threat and safe conditions. In addition, we did not find any differences in behavioral performance between the threat and safe conditions. These findings suggest that being in an anxious state reduces the neural representation for large amounts of information in WM, but have little effect on the filtering of neutral distracters.
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