Department of Psychological Sciences, University of Missouri Columbia, MO, USA.
Front Hum Neurosci. 2014 Mar 7;8:126. doi: 10.3389/fnhum.2014.00126. eCollection 2014.
We examine the relationship between response speed and the number of items in short-term memory (STM) in four different paradigms and find evidence for a similar high-speed processing rate of about 25-30 items per second (∼35-40 ms/item). We propose that the similarity of the processing rates across paradigms reflects the operation of a very basic covert memory process, high-speed retrieval, that is involved in both the search for information in STM and the reactivation or refreshing of information that keeps it in STM. We link this process to a specific pattern of rhythmic, repetitive neural activity in the brain (gamma oscillations). This proposal generates ideas for research and calls for an integrative approach that combines neuroscientific measures with behavioral cognitive techniques.
我们在四个不同的范式中研究了反应速度和短期记忆 (STM) 中项目数量之间的关系，发现每个项目的相似高速处理速度约为每秒 25-30 个（约 35-40 毫秒/个）。我们提出，不同范式中处理速度的相似性反映了一个非常基本的隐蔽记忆过程的运作，即高速检索，它既涉及在 STM 中搜索信息，也涉及重新激活或刷新保持信息在 STM 中的信息。我们将这个过程与大脑中特定的节律性、重复性神经活动模式（伽马振荡）联系起来。这个建议为研究提供了思路，并呼吁采取一种综合的方法，将神经科学测量与行为认知技术相结合。
