Getting less than that was linked to lower abilities in language, reading and early math skills.

VOA: special.2010.06.09

And once you hit puberty, suddenly there's huge variation in the abilities you have to learn language.

一旦你到了青春期,学习语言的能力会在突然间,发生巨大的变化

耶鲁公开课 - 心理学导论课程节选