Flexible working memory representation of the relationship between an object and its location as revealed by interactions with attention.
Flexible working memory representation of the relationship between an object and its location as revealed by interactions with attention.
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DOI：
10.3758/app.71.7.1525
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发表时间：
2009-10
期刊：
影响因子：
--
通讯作者：
Courtney SM
中科院分区：
文献类型：
--
作者：
Sala JB;Courtney SM
工作记忆（WM）选择性地保持有限数量的当前相关信息处于活跃状态，以影响未来的感知处理，思维和行为。在WM中保存的信息的表示是未知的，特别是对象的身份和其位置的表示之间的分离程度。目前的实验研究对象和位置WM表示的灵活性，通过测量的视觉辨别任务的反应时间在延迟期间的WM识别任务的对象的身份，位置，或两者兼而有之。结果表明，在工作记忆延迟期间，注意力偏向于与工作记忆当前内容相匹配的信息。注意力不会偏向于存在于编码记忆样本中但与记忆识别测试无关的信息。工作记忆和注意之间相互作用的这种特殊性既适用于记忆刺激的身份和位置，也适用于物体与其位置之间的关系。结果表明，当这种关系是必要的任务绩效，工作记忆代表一个对象和它的身份在一个集成的方式。然而，如果该关系与任务无关，则对象和位置信息在WM中分开表示。
Working memory (WM) selectively maintains a limited amount of currently relevant information in an active state to influence future perceptual processing, thought, and behavior. The representation of the information held in WM is unknown, particularly the degree of separation between the representation of an object’s identity and its location. The current experiments examined the flexibility of object and location WM representations by measuring reaction times on a visual discrimination task during the delay period of a WM recognition task for object identities, locations, or both. Results demonstrate that during WM delay periods attention is biased toward information that matches the current contents of WM. Attention is not biased toward information that was present in the encoded memory sample but not relevant for the memory recognition test. This specificity of the interaction between WM and attention applies to both the identity and the location of the remembered stimulus and to the relationship between an object and its location. The results suggest that when this relationship is necessary for task performance, WM represents an object and its identity in an integrated manner. However, if this relationship is not task relevant, the object and location information are represented in WM separately.