This document discusses the effects of age on second language acquisition across multiple pages. It covers several key points:
1) Age is one of the most important individual differences that can impact second language learning success. Younger learners often attain higher proficiency, especially in aspects like pronunciation, as supported by the Critical Period Hypothesis.
2) Studies have found mixed results on how age impacts various aspects of second language acquisition, such as processes, rate of learning, and achievement levels. Younger learners generally perform better in naturalistic settings while older learners do better in formal classroom settings.
3) The strongest evidence suggests that learners who begin acquiring a second language at a young age ultimately achieve higher