The <i>Handbook of Second Language Acquisition</i> presents an integrated discussion of key, and sometimes controversial, issues in second language acquisition research. <br><ul><br><li>Discusses the biological and cognitive underpinnings of SLA, mechanisms, processes, and constraints on SLA, the level of ultimate attainment, research methods, and the status of SLA as a cognitive science. <br><li>Includes contributions from twenty-seven of the world's leading scholars. <br><li>Provides an invaluable resource for all students and scholars of human cognition, including those in linguistics, psychology, applied linguistics, ESL, foreign languages, and cognitive science.</li></ul>