The Associative Structure of Memory for Multi-Element Events
The Associative Structure of Memory for Multi-Element Events
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DOI：
10.1037/a0033626
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发表时间：
2013-11-01
影响因子：
4.1
通讯作者：
Burgess, Neil
中科院分区：
文献类型：
--
作者：
Horner, Aidan J.;Burgess, Neil
海马体被认为是一个关联记忆的“会聚区”，将经历的事件的多模式元素结合在一起形成一个单一的记忆印迹。这预测了对包括事件的不同元素的检索之间的依赖程度。我们提出了一系列旨在解决这一预测的研究数据。参与者生动地想象了一系列的人的位置对象的事件，这些事件的记忆进行了评估，在多个试验的线索检索。与预测一致，一个显着的依赖性水平之间的检索不同的元素从同一事件中被发现。此外，依赖水平是敏感的提取任务，线索回忆比线索识别，和主观信心的依赖性更高。我们提出了一个简单的模型，其中事件被存储为单个事件元素之间的多个成对关联，依赖性被捕获的一个共同的因素，不同的事件。这一因素可能与编码强度的事件间调制有关，或者与检索时事件内“模式完成”的过程有关。该模型预测的依赖性的定量模式时，在猜测水平的变化与检索任务和信心的数据被考虑在内。因此，我们发现直接的行为支持的想法，记忆复杂的多模态事件取决于成对的协会，其组成元素和检索的各种元素对应于同一事件反映了一个共同的因素，不同的事件。
The hippocampus is thought to be an associative memory "convergence zone," binding together the multimodal elements of an experienced event into a single engram. This predicts a degree of dependency between the retrieval of the different elements comprising an event. We present data from a series of studies designed to address this prediction. Participants vividly imagined a series of person location object events, and memory for these events was assessed across multiple trials of cued retrieval. Consistent with the prediction, a significant level of dependency was found between the retrieval of different elements from the same event. Furthermore, the level of dependency was sensitive both to retrieval task, with higher dependency during cued recall than cued recognition, and to subjective confidence. We propose a simple model, in which events are stored as multiple pairwise associations between individual event elements, and dependency is captured by a common factor that varies across events. This factor may relate to between-events modulation of the strength of encoding, or to a process of within-event "pattern completion" at retrieval. The model predicts the quantitative pattern of dependency in the data when changes in the level of guessing with retrieval task and confidence are taken into account. Thus, we find direct behavioral support for the idea that memory for complex multimodal events depends on the pairwise associations of their constituent elements and that retrieval of the various elements corresponding to the same event reflects a common factor that varies from event to event.