Phonological processes are patterns of sound errors that typically developing children use to simplify speech as they are learning to talk as children don't have the ability to coordinate the lips, teeth, tongue and jaw for clear speech. On the other hand, phonological delay is used when a child has patterns of speech which are more typical of a younger child as the sound system is developing normally, but at a slower rate than is expected.
In children's language the command of all vowels is established before all the consonants. During 18-24 months the child may have a vocabulary of 200 words. By the age of 2;6 the average child has mastered all of the vowels and around two thirds of the consonants but by the age of 4, the child is likely to be having difficulty with only a few consonants.
The simplification of consonants helps children to communicate. There are three main types of phonological simplification:
- Deletion - for example, 'ca' rather than 'car'.
- Substitution - replacing a consonant with one that is easy to say - for example, 'wegs' rather than ' legs'.
- Cluster reduction - when there's two or more consonants in a word, a child may drop one - for example, 'geen' rather than 'green'
Key Terms:
- Over-extension - when a child uses one word for similar objects, for example an Apple for all fruit
- Melodic utterance (9-18 months) - Melody and rhythm and intonation develop. Babies of different nationalities sound increasingly different from each other.
- Addition - adding vowels on the end of a word
- Assimilation - one consonant is changed because of the influence of another constant in the same word
- Reduplication - of sounds. This occurs when different sounds in a word are pronounced the same way - for example, 'dog' becoming 'gog' or 'baybay' for 'baby'.
- Berko and Brown - fis phenomenon - child can recognise and understand a wider range of phonemes than they an produce.