This publication constitutes a selection of papers presented at the 6th International Symposium on the Acquisition of Second Language Speech, New Sounds 2010, held in Poznan, Poland. It consists of two volumes, presenting state-of-the-art achievements and perspectives for future research related to the acquisition of second language phonetics and phonology. The key issues include the development of explanatory frameworks of phonological SLA, the expanded scope of domains under investigation, modern methods applied in phonological research, and a new take on the causal variables related to...