The asymmetry and temporal dynamics of incidental letter-location bindings in working memory.

The asymmetry and temporal dynamics of incidental letter-location bindings in working memory.
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DOI:
10.1080/17470218.2014.982137
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发表时间:
2015
期刊:
Quarterly journal of experimental psychology (2006)
影响因子:
--
通讯作者:
Parmentier FB
Parmentier FB
中科院分区:
其他
文献类型:
--
作者:
Elsley JV;Parmentier FB

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言语-空间绑定是日常认知操作的组成部分(例如,阅读),但在工作记忆中支持它们的过程却知之甚少。Campo及其同事[Campo,P.,Poch,C.,Parmentier,F. B。R.,莫拉蒂,S.,Elsley,J. V.,Castellanos,N.,. Maestú,F.(2010年)。内隐字母位置联结时前额叶和后额叶的振荡活动。Neuroimage,49,2807 - 2815]最近报道的数据表明,当参与者被指示记住显示(位置中的字母)中的字母时,强制性的字母位置绑定,但当被指示记住填充位置时,没有绑定的证据。本研究对比了两种解释这种约束力的不对称性。首先,它可能是由于在表示"什么"信息时必须依赖于"在哪里",而"在哪里"信息可能与其内容无关(强不对称假设)。第二,它可能构成一个动态特征抑制过程的快照,该过程已部分完成测试:不对称抑制假说。使用Campo及其同事的任务,在显示和测试之间具有可变的保留间隔,我们在不同的位置呈现了四个辅音,并对比了"记住字母"和"记住位置"指令之间的表现。我们的数据支持强不对称假设,通过证明在言语任务中的约束,但不是在空间任务。关键的是,当存在时,语言-空间绑定非常稳定,持续至少15秒。
Verbal–spatial bindings are integral to routine cognitive operations (e.g., reading), yet the processes supporting them in working memory are little understood. Campo and colleagues [Campo, P., Poch, C., Parmentier, F. B. R., Moratti, S., Elsley, J. V., Castellanos, N., … Maestú, F. (2010). Oscillatory activity in prefrontal and posterior regions during implicit letter-location binding. Neuroimage, 49, 2807–2815] recently reported data suggesting obligatory letter–location binding when participants were directed to remember the letters in a display (of letters in locations), but no evidence for binding when instructed to remember the filled locations. The present study contrasted two explanations for this binding asymmetry. First, it may result from an obligatory dependence on “where” during the representation of “what” information, while “where” information may be held independently of its contents (the strong asymmetry hypothesis). Second, it may constitute a snapshot of a dynamic feature inhibition process that had partially completed by test: the asymmetrical inhibition hypothesis. Using Campo and colleagues’ task with a variable retention interval between display and test, we presented four consonants in distinct locations and contrasted performance between “remember letters” and “remember locations” instructions. Our data supported the strong asymmetry hypothesis through demonstrating binding in the verbal task, but not in the spatial task. Critically, when present, verbal–spatial bindings were remarkably stable, enduring for at least 15 seconds.
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