Internal vs. External Language

In Chomskian linguistics, a distinction is drawn between I-language (internal language) and E-language (external language). In this context, internal language applies to the study of syntax and semantics in language on the abstract level; as mentally represented knowledge in a native speaker. External language applies to language in social contexts, i.e. behavioral habits shared by a community. Internal language analyses operate on the assumption that all native speakers of a language are quite homogeneous in how they process and perceive language. External language fields, such as sociolinguistics, attempt to explain why this is in fact not the case. Many sociolinguists reject the distinction between I- and E-language on the grounds that it is based on a mentalist view of language. On this view, grammar is first and foremost an interactional (social) phenomenon (e.g. Elinor Ochs, Emanuel Schegloff, Sandra Thompson).