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相关概念视频

Sampling Methods: Overview01:06

Sampling Methods: Overview

527
A sample refers to a smaller subset representative of a larger population. In analytical chemistry, studying or analyzing an entire population is often impractical or impossible. Therefore, samples are used to draw inferences and generalize the whole population. The sampling method selects individuals or items from a population to create a sample. Standard sampling methods include random, judgemental, systematic, stratified, and cluster sampling. 
In analytical chemistry, the choice of...
527
Systematic Sampling Method01:17

Systematic Sampling Method

11.1K
Sampling is a technique to select a portion (or subset) of the larger population and study that portion (the sample) to gain information about the population. Data are the result of sampling from a population. The sampling method ensures that samples are drawn without bias and accurately represent the population. Because measuring the entire population in a study is not practical, researchers use samples to represent the population of interest.
Systematic sampling is one of the simplest methods...
11.1K
Sampling Plans01:23

Sampling Plans

274
Sampling is a crucial step in analytical chemistry, allowing researchers to collect representative data from a large population. Common sampling methods include random, judgmental, systematic, stratified, and cluster sampling.
Random sampling is a method where each member of the population has an equal chance of being selected for the sample. It involves selecting individuals randomly, often using random number generators or lottery-type methods. For example, when analyzing the properties of a...
274
Group Design02:01

Group Design

9.7K
The most basic experimental design involves two groups: the experimental group and the control group. The two groups are designed to be the same except for one difference— experimental manipulation. The experimental group gets the experimental manipulation—that is, the treatment or variable being tested—and the control group does not. Since experimental manipulation is the only difference between the experimental and control groups, we can be sure that any differences between...
9.7K
Sampling Methods: Sample Types01:18

Sampling Methods: Sample Types

433
Sampling materials are classified into three main types: solid, liquid, and gas.
Solid samples include a variety of substances, such as sediments from water bodies, soil, metals, and biological tissues. Two standard methods for extracting sediments from water bodies are grab sampling and piston coring. Grab sampling involves using a device to collect a discrete sediment sample from the bottom of a water body with minimal disturbance. Grab samples do not always represent the entire area due to...
433

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相关实验视频

Updated: Sep 14, 2025

Author Spotlight: Investigating the Impact of Emotional Prosodies on Voice Recognition and Perception
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收集和分析重复的语音样本:方法框架和示例协议.

Nicholas Cummins1, Lauren Louise White1, Zahia Rahman1

  • 1Department of Biostatistics & Health Informatics, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, United Kingdom.

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概括
此摘要是机器生成的。

这项研究引入了一个透明的协议和检查清单,以提高语音生物标志物研究的可重复性. 它旨在标准化数据收集和分析,以便使用语音进行更可靠的健康评估.

关键词:
卫生评估健康评估在纵向的长度上.重复录制的记录是重复的记录.复制复制复制复制复制复制复制演讲 演讲 演讲 演讲一个声音,一个声音,一个声音.在扬声器内变化的变化.

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科学领域:

  • 语音和语言病理学 语言病理学
  • 生物医学工程 生物医学工程
  • 计算语言学 计算语言学

背景情况:

  • 语音和语言生物标志物为客观健康评估提供了潜力,但由于高个体内变异性而面临挑战.
  • 在研究中关于语音特征的不一致报告阻碍了方法论的进步,复制和生物标志物识别.
  • 现有的方法经常无法充分考虑混变量,影响基于语音的健康评估的可靠性.

研究的目的:

  • 提出一个透明的语音收集和特征提取协议和设计检查清单,以促进可复制的语音研究.
  • 为了证明一个实验室协议的可行性,旨在最大限度地减少健康语音录音中的混因素.
  • 为健康评估应用程序收集和分析语音数据建立一个标准化的框架.

主要方法:

  • 开发了一种语音收集和特征提取协议,该协议基于文献综述,用于对个体内语音变异性的受控调查.
  • 协议包括唤起阅读语音,持有元音和图片描述,提取14个与健康相关的特征.
  • 使用冷凝器麦克风,3个智能手机和一款用于设备特定灵敏度分析的耳机收集的语音数据.

主要成果:

  • 收集了28名 (日队列) 和25名 (周队列) 个体的健康语音数据,并进行了重复测量.
  • 收集了参与者特征 (性别,年龄,母语) 和上下文数据 (语音使用,摄入量,情绪状态,录制时间).
  • 目前正在对个体内变异性和设备类型敏感性的分析,预计2025年将获得结果.

结论:

  • 语音数据收集,处理和报告的变化阻碍了语音生物标志物的临床翻译.
  • 为了解决研究中的不一致性,开发了一份语音策划协议设计检查清单.
  • 标准化报告和合理的协议对于使语音研究可复制和临床应用至关重要.