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where participation is higher amongst those born early in the relevant selection period (and correspondingly lower amongst those born late in the selection period) than would be expected from the normalised distribution of live births.
The selection period is usually the calendar year, the academic year or the sporting season.
A birth date prior to the cut-off date excludes an individual and a birth date after the cut-off date includes an individual.
Multi-age grouping – the broadening of cohort selection to encompass multiple chronological age groups. Relative Age Advantage – a competitive advantage accruing to an individual due to being born early in a selection period.
A 2006 study finds that relative age affects student performance and has long-lasting effects on life outcomes.
Relative Age Discrimination – indirect, systemic discrimination, disadvantaging relatively young individuals in a cohort and advantaging relatively old individuals in the same cohort.