Department of Psychology, Shanghai Normal University, Shanghai, China.
College of Nursing, Hebei University, Baoding, China.
Int J Psychophysiol. 2024 Mar;197:112300. doi: 10.1016/j.ijpsycho.2024.112300. Epub 2024 Jan 10.
It is widely accepted that familiarity can support associative memory when the to-be-remember items are unitized into a new representation. However, there has been relatively little attention devoted to investigating the effects of different unitization manipulations on associative memory. The present study aimed to address this gap by examining the effects of varying levels of unitization through three tasks: Concept definition, interactive imagery, and sentence frame tasks. The behavioral results revealed that associative memory was significantly enhanced in the interactive imagery task compared to the sentence frame task. However, no significant differences were found between the sentence frame and concept definition tasks, or between the concept definition and interactive imagery tasks. In terms of the neural correlates, the event-related potential (ERP) results revealed that the sentence frame task only elicited a significant recollection-related LPC old/new effect, while the concept definition task only elicited a significant familiarity-related FN400 old/new effect. However, the interactive representation task elicited both of these distinct effects. These findings suggest that both the concept definition and interactive imagery tasks can enhance familiarity for supporting associative memory, but their beneficial effects on associative memory or LPC old/new effects may be different.
人们普遍认为，当待记忆的项目被整合到一个新的表示中时，熟悉度可以支持联想记忆。然而，对于不同的单元化操作对联想记忆的影响，研究相对较少。本研究旨在通过三个任务：概念定义、互动想象和句子框架任务，来探讨不同单元化水平的影响，以填补这一空白。行为结果表明，与句子框架任务相比，互动想象任务中的联想记忆显著增强。然而，句子框架任务和概念定义任务之间，或概念定义任务和互动想象任务之间，没有发现显著差异。在神经相关方面，事件相关电位（ERP）结果表明，句子框架任务仅引发了显著的与回忆相关的 LPC 旧/新效应，而概念定义任务仅引发了显著的与熟悉度相关的 FN400 旧/新效应。然而，互动表示任务引发了这两种截然不同的效应。这些发现表明，概念定义和互动想象任务都可以增强熟悉度，以支持联想记忆，但它们对联想记忆或 LPC 旧/新效应的有益影响可能不同。
