A child may have an articulation disorder if they are deleting sounds (e. G, saying “doic” for “dog”), substituting sounds (e. G, “dat” for “cat”), adding￼sounds (e. G, “balue” for “blue”) or distorting sounds (e. G, “thpoon” for “spoon”). In general, there is a range of typical speech-sound development. Most children are 90% intelligible to a wider range of communication partners by the age of four. If you are concerned about your child’s speech intelligibility or articulation, it is best to seek the advice of alicensed speech-language pathologist who will conduct a formal assessment. This formal assessment will involve looking at both speech and sound production and sound error patterns or distortions.