| Pervasive Developmental Disorder (PDD) including Autism Spectrum Disorder (ASD)– A disability that affects behavior and communication. |
| Articulation Disorder – The most common speech disorder. Difficulty producing speech sounds in a clear manner that can be easily understood by listeners. |
| Fluency Disorder – A disruption in the natural flow of speech. Also know as stuttering. For example, the child may repeat sound in words or entire words. |
| Phonological Disorder – The child may have difficulty understanding how sounds within a language combine to convey meaning. |
| Expressive Language Disorder – the child has difficulty expressing thoughts or feelings in a clear and precise manner. |
| Receptive Language Disorder - The child has difficulty understanding language. |
| Augmentative and Alternative Communication (AAC) Therapy – Therapy emphasizing an alternative method of communication for individuals who are unable to communicate using speech. |
| Motor Speech Disorders – An impairment in the movement process of the speech musculature. Apraxia of speech is a motor speech disorder that affects the programming of speech musculature movement. |