regression toward the mean

• Phénomène statistique selon lequel après une observation extrême ou inhabituelle, il est probable qu'une observation plus proche de la moyenne ou de la normale suive ; souvent utilisé en psychologie, en finance et dans le sport pour expliquer pourquoi les résultats exceptionnels se normalisent avec le temps.

A statistical phenomenon where an extreme or unusual observation is likely to be followed by a more average or typical one, often used in psychology, finance, and sports to explain why exceptional results tend to normalize over time.

1. Statistical phenomenonC1formal

   The statistical tendency for extreme or unusual results to be followed by results that are closer to the average.

   régression vers la moyenne

   • After an unusually high score on the first test, the student's second score showed regression toward the mean.
   • In sports, a player's exceptional performance in one season is often followed by a more average performance due to regression toward the mean.
   • The concept of regression toward the mean explains why extreme events are often followed by less extreme ones.