http://slr.sagepub.com Second Language Research DOI: 10.1177/0267658308100285 2009; 25; 235 Second Language Research David Birdsong learnability Uninterpretable features: psychology and plasticity in second language http://slr.sagepub.com/cgi/content/abstract/25/2/235 The online version of this article can be found at: Published by: http://www.sagepublications.com can be found at: Second Language Research Additional services and information for http://slr.sagepub.com/cgi/alerts Email Alerts: http://slr.sagepub.com/subscriptions Subscriptions: http://www.sagepub.com/journalsReprints.nav Reprints: http://www.sagepub.co.uk/journalsPermissions.nav Permissions: http://slr.sagepub.com/cgi/content/refs/25/2/235 Citations at Shanghai Jiaotong University on March 12, 2009 http://slr.sagepub.com Downloaded from