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Speech Sound Disorders

Speech sound disorder (SSD) is a classificatory term of the American Speech-Language-Hearing Association. The term denotes developmental or acquired difficulties in the speech sound system related to mental representation, processing, and/or actual articulation. The developmental designation concerns people whose speech does not develop on the expected timeline with estimated prevalence varying from 2% to 26% across studies. The acquired designation indicates that brain injury, stroke, or disease has negatively impacted a person’s speech. SSDs can occur independently of other conditions or be associated with them (e.g., cognitive delay, mobility issues). This entry discusses the label SSD, reviews proposed subtypes, and suggests future directions for designation of speech difficulties.

SSD as a Label

Certain individuals may speak less clearly than others in their group. In choosing a ...

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