Open Access
The need to report effect size estimates revisited. An overview of some recommended measures of effect size
Maciej Tomczak,Ewa Tomczak +1 more
- Vol. 1, Iss: 21
TLDR
In this article, the main objectives of this contribution are to promote various effect size measures in sport sciences through, once again, bringing to the readers' attention the benefits of reporting them, and to present examples of such estimates with a greater focus on those that can be calculated for non-parametric tests.Abstract:
Recent years have witnessed a growing number of published reports that point out the need for reporting various effect size estimates in the context of null hypothesis testing (H0) as a response to a tendency for reporting tests of statistical significance only, with less attention on other important aspects of statistical analysis. In the face of considerable changes over the past several years, neglect to report effect size estimates may be noted in such fields as medical science, psychology, applied linguistics, or pedagogy. Nor have sport sciences managed to totally escape the grips of this suboptimal practice: here statistical analyses in even some of the current research reports do not go much further than computing p-values. The p-value, however, is not meant to provide information on the actual strength of the relationship between variables, and does not allow the researcher to determine the effect of one variable on another. Effect size measures serve this purpose well. While the number of reports containing statistical estimates of effect sizes calculated after applying parametric tests is steadily increasing, reporting effect sizes with non-parametric tests is still very rare. Hence, the main objectives of this contribution are to promote various effect size measures in sport sciences through, once again, bringing to the readers’ attention the benefits of reporting them, and to present examples of such estimates with a greater focus on those that can be calculated for non-parametric testsread more
Citations
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Journal ArticleDOI
Understanding the effect size and its measures
TL;DR: This paper presents and discusses the main procedures to estimate the size of an effect with respect to the specific statistical test used for hypothesis testing and can be seen as an introduction and a guide for the reader interested in the use of effect size estimation.
Journal ArticleDOI
Exploring Lifestyle Habits, Physical Activity, Anxiety and Basic Psychological Needs in a Sample of Portuguese Adults during COVID-19.
Raul Antunes,Roberta Frontini,Nuno Amaro,Rogério Salvador,Rui Matos,Pedro Morouço,Pedro Morouço,Ricardo Rebelo-Gonçalves,Ricardo Rebelo-Gonçalves +8 more
TL;DR: Strategies for promoting well-being during periods of social isolation should consider the role of psychological dimensions and lifestyle habits according to the gender or age group.
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The Temperature Sensitivity (Q10) of Soil Respiration: Controlling Factors and Spatial Prediction at Regional Scale Based on Environmental Soil Classes
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Video-Based Surgical Learning: Improving Trainee Education and Preparation for Surgery
Paulo Mota,Nuno Borges Carvalho,Emanuel Carvalho-Dias,Manuel João Costa,Jorge Correia-Pinto,Estevão Lima +5 more
TL;DR: Video-based learning is currently a hallmark of surgical preparation among residents and specialists working in Portugal and the creation of quality and scientifically accurate videos, and subsequent compilation in available video-libraries appears to be the future landscape for video- based learning.
References
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Book
Statistical Power Analysis for the Behavioral Sciences
TL;DR: The concepts of power analysis are discussed in this paper, where Chi-square Tests for Goodness of Fit and Contingency Tables, t-Test for Means, and Sign Test are used.
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Statistical Methods for Meta-Analysis
Larry V. Hedges,Ingram Olkin +1 more
TL;DR: In this article, the authors present a model for estimating the effect size from a series of experiments using a fixed effect model and a general linear model, and combine these two models to estimate the effect magnitude.
Journal ArticleDOI
Statistical Methods for Meta-Analysis.
TL;DR: In this paper, the authors present a model for estimating the effect size from a series of experiments using a fixed effect model and a general linear model, and combine these two models to estimate the effect magnitude.