Talmi Deborah, Grady Cheryl L, Goshen-Gottstein Yonatan, Moscovitch Morris
University of Toronto, Toronto, Ontario, Canada.
Psychol Sci. 2005 Sep;16(9):716-23. doi: 10.1111/j.1467-9280.2005.01601.x.
Neuroimaging data could help clarify the long-standing dispute between dual-store and single-store models of the serial position curve. Dual-store models assume that retrieval from late positions is dependent on short-term memory (STM), whereas retrieval from early positions is dependent on long-term memory (LTM). Single-store models, however, assume that retrieval processes for early and late items are similar, but that early items are more difficult to discriminate than late items. The present study used functional magnetic resonance imaging to examine this question. Ten young adults were scanned while they recognized items from early or late serial positions. Recognition of early items uniquely activated brain areas traditionally associated with LTM, namely, regions within the hippocampal memory system. None of these areas was activated for retrieval of late items. These results indicate differential use of LTM retrieval processes, and therefore support dual-store models over single-store models.
神经影像学数据有助于澄清关于系列位置曲线的双存储和单存储模型之间长期存在的争议。双存储模型假设，从较后位置的提取依赖于短期记忆（STM），而从较早位置的提取依赖于长期记忆（LTM）。然而，单存储模型假设，较早和较后项目的提取过程相似，但较早项目比晚项目更难区分。本研究使用功能磁共振成像来检验这个问题。十名年轻人在识别来自序列较早或较后位置的项目时接受扫描。对较早项目的识别独特地激活了传统上与长期记忆相关的脑区，即海马记忆系统内的区域。在提取较后项目时，这些区域均未被激活。这些结果表明长期记忆提取过程的不同用途，因此支持双存储模型而非单存储模型。
