与非参数贝叶斯主动学习对比响应函数估计
Dom C P Marticorena1,2, Quinn Wai Wong1,3, Jake Browning4,5
1Department of Biomedical Engineering, Washington University, St. Louis, MO, USA.
Journal of vision
|January 10, 2024
概括
一种新的机器学习方法用于估计对比度灵敏函数 (CSFs) 提供了精度和效率之间的可调平衡. 这种方法,MLCSF,通过比传统方法更少的刺激实现了高精度,改善了视觉功能评估.
科学领域:
- 视觉科学科学 视觉科学
- 机器学习 机器学习
- 心理物理学的精神物理.
背景情况:
- 估计多维心理测量函数,如对比感度函数 (CSFs),传统上需要在非参数精度和参数效率之间进行权衡.
- 目前用于CSF估计的临床方法通常需要妥协,例如有限的抽样或关于CSF形状的强有力的假设,因为估计时间很长.
研究的目的:
- 开发和评估一种基于机器学习的新方法来估计对比度灵敏函数 (CSFs),以平衡精度和效率.
- 使用机器学习对比响应函数 (MLCRF) 估计器量化对比检测/歧视任务的预期成功概率.
- 从MLCRF获得机器学习的CSF (MLCSF),并评估其在研究和临床环境中的实用性.
主要方法:
- 开发了机器学习对比响应函数 (MLCRF) 估计器,将问题从回归转变为分类.
- 利用贝叶斯主动学习来进行最佳的刺激选择,以加速MLCSF的融合.
- 评估了MLCSF的准确性和效率,使用了来自正规CSF和真人对比反应数据的模拟数据,并将其与常规参数估计器 (quickCSF) 进行比较.
主要成果:
- 随机刺激选择的MLCSF缓慢地趋同,但贝叶斯主动学习加速了接近一个数量级的趋同,只需要几十个刺激来进行合理的估计.
- MLCSF的效率与快速CSF相美,但系统性更高的准确性.
- 包含一个信息性的前期并不总是有利于估计者的表现.
结论:
- MLCSF估计器为评估视觉功能提供了一个强大的工具,提供了准确性和效率之间的可调节的权衡.
- 与传统方法相比,这种机器学习方法显著减少了准确估计CSF所需的刺激数量.
- 在研究和临床应用中,MLCSF具有相当大的潜力,可以提高对比敏感性评估的速度和准确性.
相关概念视频
Response Surface Methodology
133
Response Surface Methodology (RSM) is a collection of statistical and mathematical techniques used to develop, improve, and optimize processes. It is particularly valuable when many input variables or factors potentially influence a response variable.
The process of RSM involves several key steps:
The process of RSM involves several key steps:
133
One-Compartment Open Model: Wagner-Nelson and Loo Riegelman Method for ka Estimation
513
This lesson introduces two critical methods in pharmacokinetics, the Wagner-Nelson and Loo-Riegelman methods, used for estimating the absorption rate constant (ka) for drugs administered via non-intravenous routes. The Wagner-Nelson method relates ka to the plasma concentration derived from the slope of a semilog percent unabsorbed time plot. However, it is limited to drugs with one-compartment kinetics and can be impacted by factors like gastrointestinal motility or enzymatic degradation.
On...
On...
513
Calibration Curves: Linear Least Squares
1.3K
A calibration curve is a plot of the instrument's response against a series of known concentrations of a substance. This curve is used to set the instrument response levels, using the substance and its concentrations as standards. Alternatively, or additionally, an equation is fitted to the calibration curve plot and subsequently used to calculate the unknown concentrations of other samples reliably.
For data that follow a straight line, the standard method for fitting is the linear...
For data that follow a straight line, the standard method for fitting is the linear...
1.3K
Difference from Background: Limit of Detection
6.4K
The limit of detection (LOD) is the smallest amount of analyte that can be distinguished from the background noise. The LOD value corresponds to the concentration at which the analyte signal is three times larger than the standard deviation of the blank signal. Below this value, the analyte signal cannot be differentiated from the background noise. It is calculated by dividing the calibration slope by 3 times the standard deviation of the blank signals.
The LOD indicates the presence or absence...
The LOD indicates the presence or absence...
6.4K
Statistical Inference Techniques in Hypothesis Testing: Parametric Versus Nonparametric Data
130
Statistical inference techniques, paramount in hypothesis testing, differentiate into two broad categories: parametric and nonparametric statistics.
Parametric statistics, as the name suggests, assumes that data follow a specific distribution, often a normal distribution. This assumption enables robust hypothesis testing and estimation. Parametric methods, like the Student's t-test or Goodness-of-fit test, are frequently employed in biostatistics due to their robustness. For instance,...
Parametric statistics, as the name suggests, assumes that data follow a specific distribution, often a normal distribution. This assumption enables robust hypothesis testing and estimation. Parametric methods, like the Student's t-test or Goodness-of-fit test, are frequently employed in biostatistics due to their robustness. For instance,...
130
Dose-Response Relationship: Selectivity and Specificity
6.7K
Drugs exert their therapeutic effects by interacting with receptors, enzymes, or ion channels that are present throughout the human body. The strength and duration of the interaction between a drug and its target receptor are characterized by the selectivity and specificity of the drug. Selectivity refers to a drug's strong preference for its intended target over other targets. For instance, isoprenaline, a non-selective β-adrenergic agonist, interacts with both β1- and...
6.7K


