The book discusses various arguments for and against Critical Period Hypothesis for the
acquisition of foreign language native-like pronunciation. The research described in the book
encompassed adult learners of English and Polish some of whom mastered the pronunciation in
such a way that they managed to pass off as native speakers of the target language. Various
factors were examined in order to show their contribution to the ultimate success of the
learners such as a learning setting a length in learning and a training in foreign language
phonology phonetics.
