相关实验视频
Updated: Jan 8, 2026

09:36
Assessment of Child Anthropometry in a Large Epidemiologic Study
Published on: February 2, 2017
27.7K
个体内变化,我如何衡量你? 让我计算出这些方法.
Juliana Wall1, Kaylee Litson1, Ioannis Pavlidis2
1Department of Psychology, University of Houston, Houston, TX, USA.
The Clinical neuropsychologist
|December 17, 2025
概括
了解个体内变异性 (IIV) 需要仔细考虑其类型和指标. 不同的IIV指标显示了学业成绩的各种关系和预测能力,强调了需要明确的运作.
科学领域:
- 认知心理学 认知心理学
- 心理测量 心理测量 心理测量
- 教育心理学教育心理学
背景情况:
- 对于理解认知过程而言,个体内变异性 (IIV) 是至关重要的.
- 现有研究经常使用IIV的各种概念化和操作化.
- 不同IIV指标之间的关系及其对学术成绩等结果的预测有效性需要进一步调查.
研究的目的:
- 检查不同类型和个体内变异性 (IIV) 的指标之间的相互关系.
- 评估各种IIV操作的学术成绩的预测效用.
- 澄清测量IIV的概念和方法方面的考虑.
主要方法:
- 计算了三种类型的IIV (不一致性,分散,不一致性分散) 使用多个指标 (标准偏差,变化系数,剩余标准偏差).
- 在238名年轻成年人中,在六项认知和数学相关措施中评估了IIV.
- 对于每项措施,分开分数和响应时间,以分析它们的独特贡献.
主要成果:
- 变化指标相互关联,但不一致.
- 在预测学业成绩方面,不一致性IIV指标的意义在很大程度上取决于初级分数的具体测量和包含.
- 不一致度指标的分散和分散通常是显著的预测指标,但当初级得分被纳入模型时,这种效应会减弱.
结论:
- 对多个IIV类型和指标的同时检查揭示了其测量和预测的复杂性.
- 澄清特定类型的IIV,选择措施 (特别是分散) 的理由,以及包括分数与时间一起是必不可少的.
- 标准化IIV测量将提高普遍性,并指导未来的心理测量和临床研究.
相关概念视频
Variability: Analysis
421
Measures of variability are statistical metrics that reveal the dispersion pattern within a dataset. They are pivotal in biostatistics, providing insights into the heterogeneity within health and biological data. Variability signifies the degree to which data points diverge from one another, helping researchers understand the potential range of values and associated uncertainty within the data.
The range is a simple measure of variability, indicating the difference between the highest and...
The range is a simple measure of variability, indicating the difference between the highest and...
421
What is Variation?
17.5K
Apart from the measures of central tendency, distribution, outliers, and the changing characteristics of data with time, an important characteristic of any data set is its variation or spread. In some data sets, the data values are concentrated closely near the mean; in others, the data values are more widely spread out from the mean.
The range, standard deviation, standard error, and variance are the different measures of variation.
Range: The range is the difference between its maximum and...
The range, standard deviation, standard error, and variance are the different measures of variation.
Range: The range is the difference between its maximum and...
17.5K
Variation
7.7K
An important characteristic of any set of data is the variation in the data. In some data sets, the data values are concentrated closely near the mean; in other data sets, the data values are more widely spread out from the mean. The most common measure of variation, or spread, is the standard deviation, which is the square root of variance.
When independent and dependent variables are plotted on a scatter plot, the slope of a line is a value that describes the rate of change between the two...
When independent and dependent variables are plotted on a scatter plot, the slope of a line is a value that describes the rate of change between the two...
7.7K
Empirical Method to Interpret Standard Deviation
9.3K
The empirical rule, also known as the three-sigma rule, allows a statistician to interpret the standard deviation in a normally distributed dataset. The rule states that 68% of the data lies within one standard deviation from the mean, 95% lies within two standard deviations from the mean, and 99.7% lies within three standard deviations from the mean. Additionally, this rule is also called the 68-95-99.7 rule.
This rule is used widely in statistics to calculate the proportion of data values...
This rule is used widely in statistics to calculate the proportion of data values...
9.3K
Dosage Regimen: Individualization
151
Individualization in dosing regimens is the customization of medication doses for individual patients. Its necessity arises from the goal of maximizing therapeutic benefits while minimizing risks. This approach is pivotal because human responses to drugs can vary widely; what is effective for one person may be inadequate or excessive for another. Interpatient (intersubject) variability refers to differences in drug responses between individuals, while intrapatient (intrasubject) variability...
151
Variation: Normal Distribution, Range, and Standard Deviation
26.8K
In the field of psychology, there are several ways to organize measurements of a trait, feature, or characteristic (i.e., variables). Qualitative data, such as ethnicity, can be tabulated into a frequency count to provide information about the proportion, as well as the variety of groups in a sample or population. On the other hand, researchers can perform a wider set of calculations on quantitative data. The mean, mode, and median, for instance, are central tendency measures to identify a...
26.8K

