The definitional model of language

The briefest and most usual way of defining the field of linguistics is to call it the "science of language," where "language" is intended to mean a natural language. This is not a sufficient definition, since there are other sciences of language such as the psychology of language, the sociology of language, and similar disciplines. How does linguistics differ from these other fields? Linguistics can most readily be differentiated from other sciences of language by expanding its original definition to read: Linguistics is the science of language with language as its primary objective of cognition. Other sciences may also deal with language, but their interest in language is as a tool for studying the particular scientific field. In the psychology of language, for example, the major focus of interest is speech behavior as part of human behavior in