The effect of age of acquisition on ultimate attainment in second language learning has
been a controversial topic for years. After providing a very brief overview of the ideas that are
at the core of the controversy, I discuss the two main reasons why these issues are so
controversial: conceptual misunderstandings and methodological difficulties. The main part
of the article then makes suggestions for improvement in subject selection, data collection,
and instrumentation, in the hope that both sides of the debate will be able to agree on them …

Resumen" As should be apparent by now, the position taken in this book is that second
language teaching should focus on encouraging acquisition, on providing input that
stimulates the subconscious language acquisition potential all normal human beings have.
This does not mean to say, however, that there is no room at all for conscious learning.
Conscious learning does have a role, but it is no longer the lead actor in the play."(Krashen
and Terrell, 1981). In his article, the author DeKeyser (2013), points out the relevance …