Sample size calculator for reliability and validity evaluation: a Shiny R application.

IF 3.4 3区医学 Q1 HEALTH CARE SCIENCES & SERVICES

Quality of Life Research Pub Date : 2026-09-24 DOI:10.1007/s11136-026-04385-8

Macy Glover, Xi Chen, Joseph C Cappelleri, Andrea Chadwick, Shanshan Qin, Jinxiang Hu

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引用次数: 0

Abstract

Objectives: The objective is to provide a user-friendly tool for researchers to compute sample sizes for studies involving psychometric reliability and validity metrics.

Methods: The application was developed using R Shiny to create an interactive interface to calculate sample sizes for reliability, validity, and group difference assessments. For metrics already included in existing tools, cross-validation was performed to ensure consistency and accuracy. For metrics unique to this app, validation was based on formulas from the original publications.

Results: A comprehensive set of sample size calculation modules was included, covering Pearson correlation, Spearman correlation, tetrachoric correlation, point-biserial correlation, Cohen's kappa, Fleiss' kappa, Cronbach's alpha, intraclass correlation coefficient, Kendall's coefficient of concordance, one-way analysis of variance, and one-way analysis of covariance. Researchers can access detailed outputs, including sample sizes, contextual interpretations, and step-by-step derivations of the results, ensuring transparency and usability.

Conclusions: The Sample Size Calculator is a validated and helpful resource for researchers seeking to optimize study design. The calculator can be accessed at the following website: https://biostats-shinyr.kumc.edu/PsychometricN/.

查看原文本刊更多论文

用于可靠性和有效性评估的样本大小计算器：一个Shiny R应用程序。

目的：目的是为研究人员提供一个用户友好的工具来计算涉及心理测量信度和效度指标的研究样本大小。方法：使用R Shiny开发应用程序，创建一个交互式界面，用于计算信度，效度和组差异评估的样本量。对于已经包含在现有工具中的指标，执行交叉验证以确保一致性和准确性。对于这个应用程序独有的指标，验证是基于原始出版物中的公式。结果：包括Pearson相关、Spearman相关、四分频相关、点双列相关、Cohen’s kappa、Fleiss’kappa、Cronbach’s alpha、类内相关系数、Kendall’s协调系数、单向方差分析、单向协方差分析等完整的样本量计算模块。研究人员可以访问详细的输出，包括样本量、上下文解释和结果的逐步推导，确保透明度和可用性。结论：样本量计算器是一个有效的和有用的资源，为研究人员寻求优化研究设计。该计算器可在以下网站访问：https://biostats-shinyr.kumc.edu/PsychometricN/。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Quality of Life Research 医学-公共卫生、环境卫生与职业卫生

CiteScore

6.50

自引率

8.60%

发文量

224

审稿时长

3-8 weeks

期刊介绍： Quality of Life Research is an international, multidisciplinary journal devoted to the rapid communication of original research, theoretical articles and methodological reports related to the field of quality of life, in all the health sciences. The journal also offers editorials, literature, book and software reviews, correspondence and abstracts of conferences. Quality of life has become a prominent issue in biometry, philosophy, social science, clinical medicine, health services and outcomes research. The journal''s scope reflects the wide application of quality of life assessment and research in the biological and social sciences. All original work is subject to peer review for originality, scientific quality and relevance to a broad readership. This is an official journal of the International Society of Quality of Life Research.