Among all children with an SSD, what is the approximate frequency of phonological delay?

• A. 20%
• B. 10%
• C. 55%
• D. 12%

Answer: (C)

Phonological delay is the most common subtype of a speech sound disorder in kids, meaning their error patterns reflect younger-typical phonology that lags in development but eventually follows a normal path. Among all children with an SSD, roughly half to a bit more than half show this pattern, which is why about 55% is the best estimate. This reflects that many SSD cases involve broader phonological pattern errors (like fronting, cluster reductions, or simplification of sounds across the system) rather than problems limited to producing individual sounds in isolation.

In contrast, an articulation-focused issue centers on motor difficulties with single sounds rather than broader pattern-based simplifications, which is less representative of the majority of SSD cases. The other percentages would imply much smaller shares of phonological-pattern problems, which doesn’t align with the common picture in the literature.