Assessing the Evidential Value of Mental Fatigue and Exercise Research.
Détails
Télécharger: 37682411_BIB_93ED6B60EF8D.pdf (2795.79 [Ko])
Etat: Public
Version: Final published version
Licence: CC BY 4.0
Etat: Public
Version: Final published version
Licence: CC BY 4.0
ID Serval
serval:BIB_93ED6B60EF8D
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Assessing the Evidential Value of Mental Fatigue and Exercise Research.
Périodique
Sports medicine
ISSN
1179-2035 (Electronic)
ISSN-L
0112-1642
Statut éditorial
Publié
Date de publication
12/2023
Peer-reviewed
Oui
Volume
53
Numéro
12
Pages
2293-2307
Langue
anglais
Notes
Publication types: Meta-Analysis ; Journal Article
Publication Status: ppublish
Publication Status: ppublish
Résumé
It has often been reported that mental exertion, presumably leading to mental fatigue, can negatively affect exercise performance; however, recent findings have questioned the strength of the effect. To further complicate this issue, an overlooked problem might be the presence of publication bias in studies using underpowered designs, which is known to inflate false positive report probability and effect size estimates. Altogether, the presence of bias is likely to reduce the evidential value of the published literature on this topic, although it is unknown to what extent. The purpose of the current work was to assess the evidential value of studies published to date on the effect of mental exertion on exercise performance by assessing the presence of publication bias and the observed statistical power achieved by these studies. A traditional meta-analysis revealed a Cohen's d <sub>z</sub> effect size of - 0.54, 95% CI [- 0.68, - 0.40], p < .001. However, when we applied methods for estimating and correcting for publication bias (based on funnel plot asymmetry and observed p-values), we found that the bias-corrected effect size became negligible with most of publication-bias methods and decreased to - 0.36 in the more optimistic of all the scenarios. A robust Bayesian meta-analysis found strong evidence in favor of publication bias, BF <sub>pb</sub> > 1000, and inconclusive evidence in favor of the effect, adjusted d <sub>z</sub> = 0.01, 95% CrI [- 0.46, 0.37], BF <sub>10</sub> = 0.90. Furthermore, the median observed statistical power assuming the unadjusted meta-analytic effect size (i.e., - 0.54) as the true effect size was 39% (min = 19%, max = 96%), indicating that, on average, these studies only had a 39% chance of observing a significant result if the true effect was Cohen's d <sub>z</sub> = - 0.54. If the more optimistic adjusted effect size (- 0.36) was assumed as the true effect, the median statistical power was just 20%. We conclude that the current literature is a useful case study for illustrating the dangers of conducting underpowered studies to detect the effect size of interest.
Mots-clé
Humans, Bayes Theorem, Publication Bias, Mental Fatigue
Pubmed
Web of science
Open Access
Oui
Création de la notice
04/12/2023 14:54
Dernière modification de la notice
08/08/2024 7:37