Recollection and Familiarity Make Independent Contributions to Memory Judgments
Recollection and Familiarity Make Independent Contributions to Memory Judgments
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DOI：
10.1523/jneurosci.6396-11.2012
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发表时间：
2012-05-23
影响因子：
5.3
通讯作者：
Wilding, Edward L.
中科院分区：
文献类型：
--
作者：
Evans, Lisa H.;Wilding, Edward L.
再认记忆可以由回忆和熟悉的过程支持。回忆是关于先前事件的定性信息的恢复。熟悉度是一个标量强度信号，允许对先前发生的事件进行判断。关于这些过程是如何概念化的，它们如何有助于记忆判断，以及哪些大脑区域支持它们，存在激烈的争论。研究这些问题的一种流行方法是记住/知道程序，其中受试者对他们可以恢复研究遭遇的上下文细节的研究刺激给出记住响应，并且当细节没有恢复但受试者仍然相信刺激被研究时给出知道响应。根据一个模型，记住反应是强烈的记忆，通常与相对较高的回忆和熟悉程度相关。已知反应是较弱的记忆，通常与两个过程的较低水平有关。在这个实验中，我们得到了与上述说法不一致的数据。在这个实验中，我们在一项非文字记忆任务的测试阶段获得了脑磁图（MEG）神经活动的测量结果，在这项任务中，健康的志愿者对学习过的和未学习过的单词做出了记住、知道或新的判断。记忆过程的MEG指数大于知道判断，而熟悉的MEG指数则相反。重要的是，这一结果是由一个模型预测的，在这个模型中，回忆和熟悉对记住和知道的判断做出了独立的贡献，并在将记忆过程映射到其神经基质上时提供了一个强大的约束。
Recognition memory can be supported by the processes of recollection and familiarity. Recollection is recovery of qualitative information about a prior event. Familiarity is a scalar strength signal that permits judgments of prior occurrence. There is vigorous debate about how these processes are conceptualized, how they contribute to memory judgments, and which brain regions support them. One popular method for investigating these questions is the Remember/Know procedure, where subjects give a Remember response to studied stimuli for which they can recover contextual details of the study encounter, and a Know response when details are not recovered but subjects nevertheless believe that a stimulus was studied. According to one model, Remember responses are strong memories that are typically associated with relatively high levels of recollection and familiarity. Know responses are weaker memories and are typically associated with lower levels of both processes. Data inconsistent with this account were obtained in this experiment, where magnetoencephalographic (MEG) measures of neural activity were acquired in the test phase of a verbal memory task where healthy human volunteers made Remember, Know, or New judgments to studied and unstudied words. An MEG index of the process of recollection was larger for Remember than Know judgments, whereas the reverse was true for a MEG index of familiarity. Critically, this result is predicted by a model where recollection and familiarity make independent contributions to Remember and Know judgments, and provides a powerful constraint when mapping memory processes onto their neural substrates.