"One way to define linguistics is as the study of language itself, which can be contrasted with language behavior. Language behavior is studied by people in the fields of psycholinguistics, language development, natural language processing, and computational linguistics, and there is often an attempt to keep these fields distinct from linguistics "proper". I believe that it is more productive to see all of these fields as making up "the language sciences" or "language science", and it is really this meta-field that is the topic of this book." - Amira