研究不确定性的神经表示
Edgar Y Walker1, Stephan Pohl2, Rachel N Denison3
1Department of Physiology and Biophysics, Computational Neuroscience Center, University of Washington, Seattle, WA, USA.
Nature neuroscience
|October 9, 2023
概括
神经科学研究探讨了大脑如何代表不确定性,这是观察者信仰的属性. 分析基于代码和相关联的方法揭示了对未来大脑研究的补充性发现.
科学领域:
- 神经科学是一个神经科学.
- 认知科学 认知科学
- 计算神经科学是一种神经科学.
背景情况:
- 了解不确定性表示的神经基础在神经科学中至关重要.
- 不确定性,作为观察者信念的属性,为神经研究带来了独特的方法挑战.
- 现有的文献采用各种策略来研究不确定性的神经表征.
研究的目的:
- 分析和比较神经科学中用于研究大脑对不确定性表示的不同方法.
- 在不确定性研究中区分"代码驱动"和"相关"方法.
- 根据神经表征的既定标准来评估这些方法.
主要方法:
- 关于不确定性的神经表征研究的文献分析.
- 区分基于代码的研究方法和相关研究方法.
- 应用诸如敏感性,特异性,不变性和功能性等标准进行评估.
主要成果:
- 基于代码的方法假定世界状态和不确定性的特定神经代码.
- 相关性方法寻求神经活动和不确定性之间的联系,而无需预先定义的编码方案.
- 这两种方法都为神经不确定性表示提供了不同的但互补的见解.
结论:
- 该分析强调了基于代码和相关联方法的不同优缺点.
- 这两种方法的发现可以为未来的神经科学中关于不确定性的实验提供信息和指导.
- 整合来自这两种方法的见解可以促进我们对大脑功能的理解.
更多相关视频
相关概念视频
Uncertainty: Overview
570
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.
570
Propagation of Uncertainty from Random Error
704
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...
704
Uncertainty: Confidence Intervals
4.1K
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...
4.1K
Propagation of Uncertainty from Systematic Error
534
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...
534
Uncertainty in Measurement: Accuracy and Precision
73.8K
Scientists typically make repeated measurements of a quantity to ensure the quality of their findings and to evaluate both the precision and the accuracy of their results. Measurements are said to be precise if they yield very similar results when repeated in the same manner. A measurement is considered accurate if it yields a result that is very close to the true or the accepted value. Precise values agree with each other; accurate values agree with a true value.
73.8K
The Uncertainty Principle
23.4K
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...
23.4K


