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There are two main theories of Speech production, Spreading Activation Theory - SAT (Dell, 1986: Dell & O'Seaghdha, 1991) and Word- Form Encoding by Activation and Verification – WEAVER++ (Levelt et al., 1989: 1999).

The SAT theory was devised by Dell (1986) then revised by Dell & O'Seaghda (1991). The theory works on a 4 level connectionist model: parallel and dynamic.
The Semantic level is the meaning of what is going to be said.
The Syntactic level is the grammatical structure of the words in the planned utterance
The Morphological level is the morphemes (basic units of meaning of word forms) in the planned sentence.
The Phonological level is the basic unit of sound within a sentence.

In addition to the main structure of the SAT model a representation is formed at each level. Pre-Planning is more particular at the semantic level.

There are categorical rules at each level, which impose constraints on item categories and category combination.
The internal lexicon......

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Approximate Pages: 3 (250 words per double-spaced page)

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