regression toward the mean

• 一种统计现象：在出现极端或不寻常的观察结果之后，随后更可能出现较为平均或典型的结果；常用于心理学、金融和体育中，解释为何异常突出的成绩会随时间回归正常。

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.

   均值回归

   • 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.