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相关概念视频

Experimental Designs01:16

Experimental Designs

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An experimental design is a systematic process that allows researchers to evaluate the relationship between dependent and independent variables. There are three widely used types of experimental design - pre-experimental design, true experimental design, and quasi-experimental design. In pre-experimental design, the researcher compares the data before and after some interventions or treatments. The true-experimental design has more than one purposefully created group, a commonly measured...
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What is an Experiment?01:12

What is an Experiment?

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An experiment is a planned activity carried out under controlled conditions. The purpose of an experiment is to investigate the relationship between two variables. When one variable causes change in another, we call the first variable the explanatory or independent variable. The affected variable is called the response or dependent variable. In a randomized experiment, the researcher manipulates values of the explanatory variable and measures the resulting changes in the response variable. The...
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Group Design02:01

Group Design

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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...
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Ethics in Research01:56

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Today, scientists agree that good research is ethical in nature and is guided by a basic respect for human dignity and safety. However, this has not always been the case. Modern researchers must demonstrate that the research they perform is ethically sound.
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Controls in Experiments01:13

Controls in Experiments

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When conducting an experiment, it is crucial to have control to reduce bias and accurately measure the dependent variables. It also marks the results more reliable. Controls are elements in an experiment that have the same characteristics as the treatment groups but are not affected by the independent variable. By sorting these data into control and experimental conditions, the relationship between the dependent and independent variables can be drawn. A randomized experiment always includes a...
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Randomized Experiments01:13

Randomized Experiments

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The randomization process involves assigning study participants randomly to experimental or control groups based on their probability of being equally assigned. Randomization is meant to eliminate selection bias and balance known and unknown confounding factors so that the control group is similar to the treatment group as much as possible. A computer program and a random number generator can be used to assign participants to groups in a way that minimizes bias.
Simple randomization
Simple...
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预测离散选择实验:研究人员指南

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离散选择实验 (DCE) 的预测对于有效的健康偏好数据至关重要. 本文为严格的DCE预测提供了指南和示例,以改善调查设计和数据质量.

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科学领域:

  • 卫生经济学 卫生经济学
  • 行为科学是一种行为科学.
  • 调查方法调查方法.

背景情况:

  • 离散选择实验 (DCE) 被广泛用于评估健康偏好.
  • 有效的DCE设计依赖于预测,以确保仪器质量.
  • 缺乏标准化的预测实践,阻碍了严格的DCE应用.

研究的目的:

  • 定义和语境化DCE的预测测试.
  • 为DCE预测提供实用指南和面试模板.
  • 为了说明DCE预测,用从调查性遗传谱系学的例子来说明.

主要方法:

  • 文献综述,以定义DCEs中的预测.
  • 开发一个实用指南和面试模板.
  • 预测方法的应用案例研究.

主要成果:

  • 一个结构化的定义和过程,用于DCE预测.
  • 一个全面的指南和面试模板研究人员.
  • 在复杂的DCE场景中证明预测的实用性.

结论:

  • 标准化预测对于强大的DCEs至关重要.
  • 提供的指南和模板促进了严格的预测试.
  • 有效的预先测试提高了健康偏好数据的有效性和可靠性.