Robin

“For example, in Spain, the Barcelona Age Factor (BAF) project studied the effects of changing the age of beginning to teach English to Catalan/Spanish bilingual students. When the starting age for teaching English was lowered, Carmen Muñoz and her colleagues took advantage of the opportunity to compare the learning outcomes for students who had started learning at different ages. They were able to look at students’ progress after 100, 416, and 726 hours of instruction. Those who had begun to learn later (aged 11, 14, or 18+) performed better on nearly every measure than those who had begun earlier (aged 8). This was particularly true of measures based on metalinguistic awareness or analytic ability. On listening comprehension, younger starters showed some advantages. Muñoz suggests that this may be based on younger learners’ use of a more implicit approach to learning while older learners’ advantages may reflect their ability to use more explicit approaches, based on their greater cognitive maturity. She points out that, in foreign language instruction, where time is usually limited, ‘younger learners may not have enough time and exposure to benefit fully from the alleged advantages of implicit learning’ (Muñoz 2006: 33).”
― Patsy M. Lightbown, How Languages are Learned