Cortical reinstatement and the confidence and accuracy of source memory.
Cortical reinstatement and the confidence and accuracy of source memory.
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DOI：
10.1016/j.neuroimage.2015.01.003
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发表时间：
2015-04-01
期刊：
影响因子：
5.7
通讯作者：
Rugg MD
中科院分区：
文献类型：
--
作者：
Thakral PP;Wang TH;Rugg MD
大脑皮层恢复是指在编码和随后提取片段的过程中诱发的神经活动之间的重叠，并被认为是为了反映提取的助记内容。以前的研究结果表明，恢复效应反映了提取的情景信息的质量，因为这是通过来源记忆判断的准确性来操作的。目前的功能磁共振成像(FMRI)研究调查了与恢复相关的活动是否也与准确来源判断的置信度存在协变。参与者研究了物体的图片以及它们的视觉或口语名称。在测试中，他们首先区分研究过的和未研究过的图片，然后，对于每一张被判定为研究过的图片，他们还使用三分置信度来判断它是否与视觉或听觉名称配对。来源记忆判断的准确性--因此来源指定信息的质量--在高置信度判断下比在低置信度判断下更高。与通道选择性提取相关的活动(恢复效应)也与相应来源记忆判断的置信度存在协同变化。研究结果表明，支持对来源记忆的准确判断的信息质量由内容选择、提取相关神经活动的相对大小来索引。
Cortical reinstatement refers to the overlap between neural activity elicited during the encoding and the subsequent retrieval of an episode, and is held to reflect retrieved mnemonic content. Previous findings have demonstrated that reinstatement effects reflect the quality of retrieved episodic information as this is operationalized by the accuracy of source memory judgments. The present functional magnetic resonance imaging (fMRI) study investigated whether reinstatement-related activity also co-varies with the confidence of accurate source judgments. Participants studied pictures of objects along with their visual or spoken names. At test, they first discriminated between studied and unstudied pictures and then, for each picture judged as studied, they also judged whether it had been paired with a visual or auditory name, using a three-point confidence scale. Accuracy of source memory judgments – and hence the quality of the source-specifying information – was greater for high than for low confidence judgments. Modality-selective retrieval-related activity (reinstatement effects) also co-varied with the confidence of the corresponding source memory judgment. The findings indicate that the quality of the information supporting accurate judgments of source memory is indexed by the relative magnitude of content-selective, retrieval-related neural activity.
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