Which task is most sensitive for detecting AOS?

• A. Repeated phoneme sequences
• B. Sentences with complex prosody and multisyllabic words
• C. Single-word repetition
• D. Reading a single sentence aloud

Answer: (B)

Detecting apraxia of speech is most sensitive when a task pushes planning and programming of speech movements across longer, more complex sequences. Sentences that have complex prosody and multisyllabic words require coordinating many rapid articulatory transitions, varied stress patterns, and longer motor plans. That higher demand makes subtle planning and programming breakdowns easier to spot, so errors and distortions appear more clearly and consistently.

Shorter tasks like repeating phoneme sequences or single words rely more on basic motor execution or short, well-practiced sequences, which can mask planning difficulties. Reading a single sentence aloud is still a fluent, practiced task that doesn’t stress the full winding together of multiple syllables and prosodic patterns to the same extent as a highly complex sentence, so it’s less sensitive than the complex-structure sentence option.