I believe that although adults may generally be able to learn a new language as quick as or even maybe quicker than children at first, in the long run, the earlier you start learning a language the more proficient you will become overall. Pronunciation in particular is attained better when starting earlier. I believe this is because the younger you start learning a language the more natural it is. According to Brown-Larson Hall, “there seems to be a natural process of learning a language that develops along the same lines of natural development.” I do believe as far as vocabulary development and grammar structure, adults can gain quicker at first. According to Collier, “children’s second language acquisition appears superior largely because the structure and vocabulary they need for adequate communication is are so much simpler than compared to adults.” However, the more natural learning a language is, the more it is retained I believe. Brown-Larson Hall also explains research showing that in the long run, children usually are much more proficient overall when comparing to a native speaker.