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相关概念视频

Uncertainty: Overview00:59

Uncertainty: Overview

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In analytical chemistry, we often perform repetitive measurements to detect and minimize inaccuracies caused by both determinate and indeterminate errors. Despite the cares we take, the presence of random errors means that repeated measurements almost never have exactly the same magnitude. The collective difference between these measurements - observed values - and the estimated or expected value is called uncertainty. Uncertainty is conventionally written after the estimated or expected value.
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Propagation of Uncertainty from Random Error00:59

Propagation of Uncertainty from Random Error

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An experiment often consists of more than a single step. In this case, measurements at each step give rise to uncertainty. Because the measurements occur in successive steps, the uncertainty in one step necessarily contributes to that in the subsequent step. As we perform statistical analysis on these types of experiments, we must learn to account for the propagation of uncertainty from one step to the next. The propagation of uncertainty depends on the type of arithmetic operation performed on...
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Uncertainty: Confidence Intervals00:54

Uncertainty: Confidence Intervals

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The confidence interval is the range of values around the mean that contains the true mean. It is expressed as a probability percentage. The interpretation of a 95% confidence interval, for instance, is that the statistician is 95% confident that the true mean falls within the interval. The upper and lower limits of this range are known as confidence limits. The confidence limits for the true mean are estimated from the sample's mean, the standard deviation, and the statistical factor...
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Anxiety: Overview01:18

Anxiety: Overview

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Anxiety is a common mental disorder featuring excessive worry, fear, and apprehension, significantly affecting daily life. People with anxiety disorders experience persistent and intense anxiety, interrupting their everyday functioning.
Individuals with anxiety often experience a range of physical and emotional symptoms, including sweating, trembling, tachycardia, and disturbances in sleep patterns. These symptoms vary in intensity and frequency but are generally disruptive and distressing.
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The Uncertainty Principle04:08

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Werner Heisenberg considered the limits of how accurately one can measure properties of an electron or other microscopic particles. He determined that there is a fundamental limit to how accurately one can measure both a particle’s position and its momentum simultaneously. The more accurate the measurement of the momentum of a particle is known, the less accurate the position at that time is known and vice versa. This is what is now called the Heisenberg uncertainty principle. He...
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Propagation of Uncertainty from Systematic Error01:10

Propagation of Uncertainty from Systematic Error

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The atomic mass of an element varies due to the relative ratio of its isotopes. A sample's relative proportion of oxygen isotopes influences its average atomic mass. For instance, if we were to measure the atomic mass of oxygen from a sample, the mass would be a weighted average of the isotopic masses of oxygen in that sample. Since a single sample is not likely to perfectly reflect the true atomic mass of oxygen for all the molecules of oxygen on Earth, the mass we obtain from this...
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相关实验视频

Updated: Jul 5, 2025

Using the Threat Probability Task to Assess Anxiety and Fear During Uncertain and Certain Threat
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通过不确定性量化理解焦虑.

Friederike Elisabeth Hedley1, Emmett Larsen2, Aprajita Mohanty2

  • 1Department of Psychology, The University of Hong Kong, Hong Kong SAR, China.

British journal of psychology (London, England : 1953)
|January 12, 2024
PubMed
概括

本研究通过提出一个结构化的定义,澄清了焦虑研究中的不确定性概念. 这一框架有助于理解焦虑机制,并开发出更好的治疗方法.

关键词:
贝叶斯的理论是贝叶斯的理论.焦虑是一种焦虑.对不确定性的不容忍.研究领域标准研究领域标准不确定性量化不确定性量化

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Reducing State Anxiety Using Working Memory Maintenance

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相关实验视频

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科学领域:

  • 认知心理学 认知心理学
  • 临床心理学 临床心理学
  • 计算精神病学是一种计算精神病学.

背景情况:

  • 不确定性是焦虑理论的核心,但缺乏一致的定义.
  • 这种模糊性阻碍了对焦虑的认知和生物基础的研究.
  • 它还阻碍了理论发展和临床应用.

研究的目的:

  • 为认知和临床科学中的不确定性提出一个明确的概念结构,重点关注焦虑.
  • 澄清不确定性概念及其在精神病理学中的作用.
  • 为了促进研究和临床实践的不确定性的正式量化.

主要方法:

  • 根据贝叶斯决策理论的不确定性分解.
  • 将这个框架应用于现有的精神病理学研究模型.
  • 讨论概念结构对焦虑的应用.

主要成果:

  • 在焦虑的背景下,对不确定性提出了一个概念结构.
  • 展示该结构如何澄清现有的理论框架.
  • 确定各种不确定性类型的正式量化方法.

结论:

  • 对不确定性的统一概念结构增强了对焦虑的研究.
  • 正式量化不确定性可以推进计算精神病学.
  • 该框架支持改善焦虑障碍的诊断和干预措施.