This book explores the importance of cross-linguistic similarity in foreign language learning. While linguists have primarily focussed upon differences between languages, learners strive to make use of any similarities to prior linguistic knowledge they can perceive. The role of positive transfer is emphasized as well as the essential differences between comprehension and production. In comprehension of related languages, cross-linguistic similarities are easily perceived while in comprehension of distant languages they are merely assumed. Production may be based on previous perception of...