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相关概念视频

Surveys02:16

Surveys

14.8K
Often, psychologists develop surveys as a means of gathering data. Surveys are lists of questions to be answered by research participants, and can be delivered as paper-and-pencil questionnaires, administered electronically, or conducted verbally. Generally, the survey itself can be completed in a short time, and the ease of administering a survey makes it easy to collect data from a large number of people.
14.8K
Convenience Sampling Method00:55

Convenience Sampling Method

9.0K
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.
Convenience sampling is a non-random method of sample selection; this method selects individuals that are easily accessible and may result in biased data. For example, a marketing...
9.0K
Stratified Sampling Method01:16

Stratified Sampling Method

12.1K
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. 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.
To choose a stratified sample, divide the population into groups called strata and then take a...
12.1K
Systematic Sampling Method01:17

Systematic Sampling Method

10.4K
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...
10.4K
Cluster Sampling Method01:20

Cluster Sampling Method

12.0K
Appropriate sampling methods ensure 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.
To choose a cluster sample, divide the population into clusters (groups) and then randomly select some of the clusters. All the members from these clusters are in the cluster sample. For example, if you randomly sample four departments from your...
12.0K
Data Collection by Survey01:07

Data Collection by Survey

6.5K
The systematic method of obtaining and analyzing accurate information of a population is called data collection. A survey is a standard method of data collection that involves collecting information from a target human population about their experience, opinion, or knowledge of a product, service, or process. The responses are recorded and interpreted. The most common survey examples are written questionnaires, face-to-face or telephonic conversations, focus groups, and electronic (e-mail or...
6.5K

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相关实验视频

Updated: Jul 24, 2025

Swabbing the Urban Environment - A Pipeline for Sampling and Detection of SARS-CoV-2 From Environmental Reservoirs
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Swabbing the Urban Environment - A Pipeline for Sampling and Detection of SARS-CoV-2 From Environmental Reservoirs

Published on: April 9, 2021

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设计和实施一个基于网络的,受访者驱动的抽样解决方案.

Catherine R McGowan1, Promise Ekoriko2,3, Mervat Alhaffar2

  • 1Department of Infectious Disease Epidemiology and International Health, Faculty of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, Keppel Street, London, WC1E 7HT, UK. Catherine.McGowan@lshtm.ac.uk.

BMC medical informatics and decision making
|July 5, 2023
PubMed
概括
此摘要是机器生成的。

我们开发了一个基于网络的受访者驱动抽样 (webRDS) 解决方案,用于全球调查. 尽管招聘和接受率低于预期的挑战,但该系统为多元化人口研究提供了一种有效的方法.

关键词:
链路推 链路推 链路推难以接触的人口.估计死亡率的估计.受访者驱动的抽样采集这就是为什么也门也门也门也门.在WebRDS中,使用的是webRDS.

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Online Explorative Study on the Learning Uses of Virtual Reality Among Early Adopters
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科学领域:

  • 公共卫生 公共卫生
  • 流行病学 流行病学
  • 调查方法 调查方法

背景情况:

  • 受访者驱动采样 (RDS) 是采样和分析的连锁推方法.
  • 基于网络的受访者驱动抽样 (webRDS) 将互联网招聘与电子调查相结合.
  • 目前没有商用webRDS解决方案可用,需要定制开发.

研究的目的:

  • 设计和开发一个新的webRDS解决方案.
  • 支持研究估计也门冲突造成的死亡率.
  • 创建一个用于管理和管理RDS调查级联的系统.

主要方法:

  • 使用ODK调查平台和定制RDS系统开发了一个webRDS解决方案.
  • 该RDS系统包括一个API,参与者客户端和管理员界面.
  • 在开发过程中与也门民的成员进行了商.

主要成果:

  • 由于WhatsApp的政策,短信限制和过,出现了技术挑战.
  • 由于消耗链接和调查设计等因素,调查采用率低于预期.
  • 短信/WhatsApp集成在通信中带来了复杂性和局限性.

结论:

  • 开发的webRDS解决方案提供了一种高效和灵活的方法来调查全球多样化的人口.
  • 尽管采用率较低,但该系统显示出未来研究应用的潜力.
  • 进一步的改进可能会解决招聘挑战,并提高参与者的参与度.