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相关概念视频

Decision Making01:20

Decision Making

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Decision-making is a fundamental cognitive process that involves evaluating alternatives and selecting among them. This process can range from simple choices, such as deciding what to wear, to complex decisions, like choosing a major in college or a career path. The complexity of the decision often dictates the approach we use, which can be broadly categorized into two types: automatic and controlled decision-making.
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Decision Making: P-value Method01:09

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The process of hypothesis testing based on the P-value method includes calculating the P- value using the sample data and interpreting it.
First, a specific claim about the population parameter is proposed. The claim is based on the research question and is stated in a simple form. Further, an opposing statement to the claim  is also stated. These statements can act as null and alternative hypotheses:  a null hypothesis would be a neutral statement while the alternative hypothesis can...
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Decision Making: Traditional Method01:14

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The process of hypothesis testing based on the traditional method includes calculating the critical value, testing the value of the test statistic using the sample data, and interpreting these values.
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Statically Indeterminate Problem Solving01:16

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Statically indeterminate problems are those where statics alone can not determine the internal forces or reactions. Consider a structure comprising two cylindrical rods made of steel and brass. These rods are joined at point B and restrained by rigid supports at points A and C. Now, the reactions at points A and C and the deflection at point B are to be determined. This rod structure is classified as statically indeterminate as the structure has more supports than are necessary for maintaining...
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Woodward–Hoffmann Selection Rules and Microscopic Reversibility01:34

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Electrocyclic reactions, cycloadditions, and sigmatropic rearrangements are concerted pericyclic reactions that proceed via a cyclic transition state. These reactions are stereospecific and regioselective. The stereochemistry of the products depends on the symmetry characteristics of the interacting orbitals and the reaction conditions. Accordingly, pericyclic reactions are classified as either symmetry-allowed or symmetry-forbidden. Woodward and Hoffmann presented the selection criteria for...
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Proportional-Derivative (PD) control is a widely used control method in various engineering systems to enhance stability and performance. In a system with only proportional control, common issues include high maximum overshoot and oscillation, observed in both the error signal and its rate of change. This behavior can be divided into three distinct phases: initial overshoot, subsequent undershoot, and gradual stabilization.
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在实时解码和扰乱决策状态

Diogo Peixoto1,2,3, Jessica R Verhein4,5,6, Roozbeh Kiani7

  • 1Neurobiology Department, Stanford University, Stanford, CA, USA. dpeixoto@stanford.edu.

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|January 21, 2021
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概括

中的神经活动波动 (DV) 可以实时预测选择,为决策过程和思维变化提供新的见解.

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科学领域:

  • 神经科学
  • 认知科学
  • 如何做出决定

背景情况:

  • 试验对象将多个信号样本整合在一起,
  • 来自神经活动的决策变量 (DV) 可以预测选择,但试验内波动的理解很差.

研究的目的:

  • 研究试验内决策变量波动的行为意义.
  • 实时检查神经活动,决策状态和行为选择之间的关系.

主要方法:

  • 在中利用神经反控制刺激持续时间.
  • 从运动皮层神经群体活动中解码决策变量.
  • 应用弱刺激脉冲来探测单个试验的决策动态.

主要成果:

  • 在试验中,来自运动皮层的DV波动强烈地预测了行为选择.
  • 视频频率的波动比条件平均值或仅视觉刺激更具预测性.
  • 观察到的DV标志的变化与行为"心态变化"一致.

结论:

  • 试验中的神经波动对于在动态环境中预测决策至关重要.
  • 证明了时间变化的决策边界,区分决策模式.
  • 提供了一种探索单一审判决策动态的新方法.