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相关概念视频

One-Way ANOVA: Equal Sample Sizes01:15

One-Way ANOVA: Equal Sample Sizes

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One-Way ANOVA can be performed on three or more samples with equal or unequal sample sizes. When one-way ANOVA is performed on two datasets with samples of equal sizes, it can be easily observed that the computed F statistic is highly sensitive to the sample mean.
Different sample means can result in different values for the variance estimate: variance between samples. This is because the variance between samples is calculated as the product of the sample size and the variance between the...
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Factorial Design02:01

Factorial Design

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Factorial Analysis is an experimental design that applies Analysis of Variance (ANOVA) statistical procedures to examine a change in a dependent variable due to more than one independent variable, also known as factors. Changes in worker productivity can be reasoned, for example, to be influenced by salary and other conditions, such as skill level. One way to test this hypothesis is by categorizing salary into three levels (low, moderate, and high) and skills sets into two levels (entry level...
13.0K
Sample Size Calculation01:19

Sample Size Calculation

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Knowledge of the sample size is the first requirement to conduct random sampling or an experiment. The sample size is the total number of units, observations, or groups (in some cases) used to get the data to estimate a population parameter. As the name suggests, the sample size is that of the sample drawn from the population and differs from the population size.
The sample size for the given experiment or sampling effort is fundamental to any study design. Sample size decides the number of...
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Distributions to Estimate Population Parameter01:26

Distributions to Estimate Population Parameter

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The accurate values of population parameters such as population proportion, population mean, and population standard deviation (or variance) are usually unknown. These are fixed values that can only be estimated from the data collected from the samples. The estimates of each of these parameters are sample proportion, the sample mean, and sample standard deviation (or variance). To obtain the values of these sample statistics, data are required that have particular distribution and central...
4.1K
One-Way ANOVA: Unequal Sample Sizes01:15

One-Way ANOVA: Unequal Sample Sizes

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One-way ANOVA can be performed on three or more samples of unequal sizes. However, calculations get complicated when sample sizes are not always the same. So, while performing ANOVA with unequal samples size, the following equation is used:
5.7K
Testing a Claim about Population Proportion01:24

Testing a Claim about Population Proportion

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A complete procedure for testing a claim about a population proportion is provided here.
There are two methods of testing a claim about a population proportion: (1) Using the sample proportion from the data where a binomial distribution is approximated to the normal distribution and (2) Using the binomial probabilities calculated from the data.
The first method uses normal distribution as an approximation to the binomial distribution. The requirements are as follows: sample size is large...
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相关实验视频

Updated: Jun 25, 2025

Problem-Solving Before Instruction PS-I: A Protocol for Assessment and Intervention in Students with Different Abilities
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单个案例设计效果大小分布:与程序参数的关联.

Jennifer R Ledford1, Paige B Eyler1, Sienna A Windsor1

  • 1Department of Special Education, Peabody College, Vanderbilt University.

School psychology (Washington, D.C.)
|May 23, 2024
PubMed
概括

单个案例研究中的效果大小有助于衡量行为变化的大小. 这次审查分析了小学干预措施,发现设计和测量选择对参与和挑战性行为的影响有影响.

科学领域:

  • 行为分析行为分析.
  • 教育心理学教育心理学
  • 单个案例研究设计.

背景情况:

  • 视觉分析是传统的单个案例研究,但效果大小提供了对行为变化的定量见解.
  • 单个案例设计中的方法选择可能会影响观察到的行为变化的大小.
  • 关于设计类型和测量系统如何影响效果尺寸的研究有限.

研究的目的:

  • 系统地审查小学单个案例干预研究中的效果大小.
  • 描述参与和具有挑战性的行为的效果大小.
  • 检查方法学因素对效果大小的影响.

主要方法:

  • 在小学课堂上对单个案例干预研究的系统审查.
  • 对参与和具有挑战性的行为效果大小的分析.
  • 检查设计类型 (例如,A-B-A-B,多个基线) 和测量系统.

主要成果:

  • A-B-A-B和多个基线跨参与者设计是最常见的.
  • 对于参与行为,使用了多种不同的测量系统,但不是具有挑战性的行为.
  • 效果大小的变化与依赖变量类型,设计类型和测量系统有关.

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结论:

  • 从经验上得出的效果大小分布可以帮助研究人员将单个案例研究结果置于背景中.
  • 在解释单个案例研究中的效果大小时,方法选择是重要的考虑因素.
  • 这项研究为了解教育环境中的行为变化提供了有价值的基准.