Corrective adjustment methods for relative age effects on French young swimmers’ performances

Audrey Difernand, Quentin De Larochelambert, Robin Pla, Kilian Barlier, Andy Marc, Samuel Ferri, Olivier Dupas, Juliana Antero, Jean-François Toussaint and Adrien Sedeaud

PLOS ONE, 2023, vol. 18, issue 4, 1-11

Abstract: Background: This study aimed to identify a Relative Age Effect (RAE) among French young swimmers and apply corrective adjustment procedures to rebalance performances according to categories and events. Methods: 5,339,351 performances of French swimmers aged 10 to 18 were collected between 2000 and 2019. Birth quarters distribution was examined according to competitiveness level (‘All’, ‘Top50%’, ‘Top25%’ and ‘Top10%’), event and age category. A linear relationship between the distribution of performances and calendar days provides a calibration coefficient allowing to rebalance performances by considering the effect of RAE for each event. Then, adjusted performances are recalculated using this coefficient, the initial performance and the relative age. Results: Proportion of swimmers born in the first quarter was higher than the proportion of those born in the last quarter for all events and strokes (p

Date: 2023
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Persistent link: https://EconPapers.repec.org/RePEc:plo:pone00:0283229

DOI: 10.1371/journal.pone.0283229

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