Phonological disorder

Phonological disorder is a failure to use speech sounds appropriate for the individual's age and dialect.

This disorder is more common in boys. Approximately 10% of children under age 8 and 5% of those over age 8 have the disorder. By age 17, only 0.5% are affected.

The cause of phonological disorder in children in unknown. There may be a genetic component since a large proportion of children with this problem have relatives with a type of similar disorder. Other risk factors seem to be low socioeconomic status and coming from a large family.

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