What are the three major theories or models of speech control, and what is the major premise of each theory?
The three major theories or models of speech control include the following:
1. The central control theory, which postulates that there is a "master control" system that dictates that muscle movements are based on the linguistic goal. The master control system administers muscle commands and accounts for the dominance of articulation for speech.
2. The dynamic or action theory models explain the physical properties involved in articulation. These theories account for the difficulties in articulation theory and explain how the system adapts to changes in the environment that might affect articulation.
3. The DIVA model of speech production refers to the directions into velocities of articulation. This model involves some forms of feedback concerning the accuracy of articulation. Feedback includes auditory feedback, tactile feedback, kinesthetic feedback, and feedback from external sources. The model establishes that learning takes place due to the feedback system of error correction. The DIVA model has started some clinical trials concerning a therapeutic use of the system, which is based on the use of a speech synthesizer. A major goal of the DIVA model is to enable people with neurological speech disabilities to express their thoughts via electrodes implanted in the brain and a speech synthesizer.
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