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相关概念视频

Retrieval01:12

Retrieval

107
Retrieval is the process of getting information out of memory storage and back into conscious awareness. This ability is essential for daily tasks like brushing hair and teeth, driving to work, and performing job duties. Retrieval occurs in three ways: recall, recognition, and relearning.
Recall involves accessing information without cues, such as during an essay test, where individuals must retrieve facts and concepts from memory unaided. Another example is remembering the name of a colleague...
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Implicit Memories01:24

Implicit Memories

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Implicit memories, also known as non-declarative memories, are long-term memories that function outside of conscious awareness. These memories influence behavior and skills without explicit knowledge. This type of memory is evident in tasks like playing tennis, snowboarding, and texting. Implicit memory has three subsystems: procedural memory, conditioning, and priming. This type of memory is essential in various activities, from everyday tasks to specialized skills.
One key aspect of implicit...
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Storage01:23

Storage

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A schema is a mental framework that helps individuals organize and interpret information. Schemata, formed from previous experiences, influence how we process new information: how we encode it, the inferences we make, and how we retrieve it. For instance, a schema for what a typical classroom looks like might include desks, a teacher's desk, a whiteboard, and students in such an environment. This expectation helps us quickly understand and navigate new classrooms without needing to analyze...
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Elaborative Rehearsals01:07

Elaborative Rehearsals

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Elaborative rehearsal is a crucial cognitive strategy that strengthens information encoding in long-term memory by making meaningful connections between new data and pre-existing knowledge. This approach contrasts with maintenance rehearsal, which involves simple repetition without delving into the significance of the information. While maintenance rehearsal might temporarily keep information active in short-term memory, it is less effective for long-term retention.
The effectiveness of...
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Long-term Potentiation01:35

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Long-term potentiation, or LTP, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTP is the process of synaptic strengthening that occurs over time between pre- and postsynaptic neuronal connections. The synaptic strengthening of LTP works in opposition to the synaptic weakening of long-term depression (LTD) and together are the main mechanisms that underlie learning and memory.
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High-Level and Low-Level Awareness01:19

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Controlled processes in human consciousness represent high-alert mental states where individuals deliberately focus their attention on achieving specific goals. Controlled processes can be seen in situations like mastering new technology, where a person might become so absorbed that they ignore surrounding distractions. Such processes involve selective attention, requiring one to concentrate on particular elements of experience while disregarding others. These are governed by executive...
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相关实验视频

Updated: Jun 22, 2025

Task Interruption and Resumption Paradigm for Testing the Activation and Pursuit of an Abstract Thinking Goal
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上向下任务目标诱导检索状态.

Devyn E Smith1, Nicole M Long

  • 1Department of Psychology, University of Virginia, Charlottesville, VA 22904.

The Journal of neuroscience : the official journal of the Society for Neuroscience
|June 26, 2024
PubMed
概括
此摘要是机器生成的。

上向下目标是识别物品,独立于刺激的重复,参与检索状态. 这表明内部注意力驱动记忆检索,影响认知处理.

关键词:
这是一个EEGEEGEEGEEGEEGEEGEEG.MVPA MVPA是什么意思大脑状态 大脑状态编码 编码 编码 编码检索恢复 检索 检索

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科学领域:

  • 认知神经科学 认知神经科学
  • 记忆研究 记忆研究
  • 人类心理学 人类心理学

背景情况:

  • 检索状态影响认知处理和行为.
  • 在引入检索状态时,自上而下 (目标) 和自下而上 (刺激属性) 因素之间的相互作用尚未完全理解.
  • 了解这些因素对于解释大脑状态控制如何影响认知至关重要.

研究的目的:

  • 调查自上而下的目标和自下而上的刺激特性对恢复状态参与的独立和联合影响.
  • 为了确定与任务相关的与与任务无关的大脑状态如何影响记忆识别.
  • 为了澄清引发检索状态的机制.

主要方法:

  • 人类参与者执行了识别记忆任务,测试阶段的目标各不相同.
  • 头皮脑电图 (EEG) 被记录下来.
  • 使用独立验证的记忆状态分类器,根据任务目标和刺激重复 (成功与正确拒绝) 来测量检索状态参与度.

主要成果:

  • 检索状态被用于击中目标,不管是上下目标.
  • 在正确的拒绝过程中,只有当目标是识别旧物品时,检索状态才会被启动.
  • 当目标是识别旧项目时,在低信任度的命中中,检索状态的参与度高于高信任度的命中.

结论:

  • 上向下要求识别旧物品可以独立于自下而上的刺激因素来诱导检索状态.
  • 这表明,内部的注意力可能被招募来促进存储的记忆表征的访问.
  • 这些发现为对大脑状态的控制及其对记忆识别等认知功能的影响提供了关键的见解.