Phonology is the sound system of language. Phonological processes are simplifications used by children not capable of producing adult speech patterns. A disorder in this area results in a lack of understanding of the rules for how sounds fit together to make words and use simple processes to simplify words. Children who have phonological disorders are at risk for reading and learning problems.
Phonological processes can be broken up into three categories: syllable structure, substitution, and assimilatory processes. These groups are further divided into more specific delays seen in normal children's developing speech. Below are examples of these processes.