The Relative Age Effect
In youth sports and academia, statistics show a significant "talent bias" towards kids who were born in January. Conversely, those born in the last months of the year tend to have all kinds of issues - they are more prone to social challenges, struggle in sports and are over-represented among those who get diagnosed with ADHD. The sign of either a winner or a loser, but rarely something in between. This is called the Relative Age Effect (RAE), also known as birthdate effect. Because schoolkids are grouped according to their birth year, those who have been born early in the year have a significant edge in both their mental and physical development compared to those born in the last months. And so, among other kids in their class they stand out as faster, stronger and more mature than their classmates, while in reality they are simply older. School is a competitive environment, but the competition isn't fair. While trained (and competent ) teachers are aware of RAE and sho...