What differences are there in the way in which individual learners acquire a second language? Age Language aptitude Learning styles Motivation Personality sex Social factors:Social class Affective states: Anxiety general factorsAge what do you think of bilinggual kindergartens? Can they benefit childrens SLA? Children vs. teenager vs.adults(pronunciation/ rate/grammmar) Critical period hypothesis (pronunciation/ grammar) 1. 学习外语的开始年龄并不在很大程度上影响习得的程序，任 何年龄开始学习一门外语都有可能获得成功。 2. 学习外语的起始年龄较明显地影响习得的速度和
