Childhood Apraxia of Speech arises from miscoordination of multiple articulators. Which of the following is cited as a common sign?

• A. Better accuracy during imitation than during spontaneous picture naming
• B. Difficulty imitating oral movements such as touching the tongue tip to the side of the mouth
• C. An unusually slow rate of speech, especially when repeating single syllables
• D. Unusual prosody in which duration, loudness, and pitch cues are incongruent

Answer: (D)

In this disorder, the core problem is planning and programming the movements of several articulators (lips, tongue, jaw, larynx) so they work together smoothly. When that motor plan is off, the timing and coordination of how speech sounds are produced can become inconsistent and atypical, including how the voice is shaped over the course of an utterance. One particularly telling sign is prosody that doesn’t line up with the intended speech pattern. Specifically, duration (how long sounds and pauses last), loudness (volume), and pitch (intonation) can be incongruent with each other and with the linguistic structure being spoken. That kind of irregular, off-rhythm prosody is commonly noted in childhood apraxia of speech, reflecting the underlying difficulty in coordinating all the articulators to produce fluent, well-timed speech.

While some individuals with CAS may show better imitation than spontaneous speech or have difficulty with certain non-speech oral movements, these are less reliable or less universal indicators. Slow rate can occur, but it doesn’t capture the distinctive prosodic disruption that this disorder often presents with.