The Rationale of an Invariant-Based Textbook Theory
The Chapter provides a concluding conceptual overview on theoretical perspectives of the practical interpretation of binary predicative units within an invariant approach to SLA. An important advantage of the invariant-based textbook theory is that binary predicative units function within the entire discourse ranging from the simplest to the most complicated structures. Binary predicative units initiate and congregate the speech modes, successively activating egocentric, inner, and oral speech, thus developing grounds for writing. Another advantage of the invariant textbook theory and corresponding technology is the highest degree of the learner's involvement in second language acquisition. The acquirer's communicative competence is characterized not only by their ability to produce or perceive authentic utterances but also by the ability to express their attitudes and frame the interlocutor's in any form of communication.