Developmental phonological disorder

Developmental phonological disorder determines a child's difficulty in organizing, learning and representing the sounds and phonological system of its language. The difficulty of children with a phonological disorder is to distinguish sounds that are similar to each other because their phonological system is not proportional to the normal patterns of the  given age.

This means that an entire set of sounds has not been attained correctly and therefore multiple sounds are mispronounced, whereas they should not be according to the age of the child. The result of this difficulty is the reduced comprehension of their speech mainly by people unfamiliar to them and consequently causes difficulties in communication.

A child's speech comprehension plays a crucial role in their communication and must be acquired at the highest rate by the age of three. Otherwise, the child should be evaluated by  a speech therapist for the existence of a phonological or other disorder.