Language Development Spring 2016 Koki Shimazu Critical review of critical period hypothesis and ultimate attainment Word count: 4,854 words Chloë Marshall, Julie Dockrell, Julie Radford I confirm that I have read and understand the Institute’s Code on Citing Sources and Avoidance of Plagiarism. I confirm that this assignment is all my own work and confirms to this Code. MA in Applied Linguistics UCL Institute of Education March 2016