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Phonological Process Disorder vs. Childhood Apraxia of Speech

A phonological process disorder and Childhood Apraxia of Speech (CAS) are two speech disorders that affect your child’s intelligibility and in some cases, can present similarly. However, characteristics of these two are different.

Phonological Process Disorder:

A phonological process is a predicted and patterned speech sound error.  Speech sounds developmentally progress in your child’s speech. If a sound is too difficult to produce or developmentally inappropriate, children naturally simplify it to an easier sound, thus producing a phonological process. For more information on sound development, click here to read my blog entitled Speech Sound Developmental Milestones.

Click here to learn more about phonological process elimination.

Below are some red flags of a phonological process disorder:

  • Unintelligible speech (a child should be understood 75% of the time at age 3, 80% of the time at age 4, 90+% of the time at age 5)
  • Frustration from your child when his/her speech is not understood
  • Patterned and predicable errors: consistent substitution of P for F such as “peet” for “feet”  Read more