Which assessment is most sensitive to detecting planning deficits across novel, fast articulatory sequences in AOS?

• A. AMR tasks.
• B. Single-word naming.
• C. SMR tasks.
• D. Prosody rating.

Answer: (C)

Coordinating rapid, novel sequences taps the motor planning and programming stage most directly. In apraxia of speech, the difficulty often lies in how the brain plans and sequences multiple articulators for a new, fast sequence, not just in producing individual sounds. Tasks that require rapid, coordinated sequencing of several articulators—SMR tasks—force you to plan the exact order and timing of movements across successive phonemes. When planning is compromised, performance on these tasks shows more pronounced timing issues, sequencing errors, and slowed initiation, especially at high speeds, making SMR the most sensitive measure for detecting planning deficits in this context. In contrast, AMR tasks ask for quick repetition of simple syllables, which mainly tests the speed and precision of single-articulator movements rather than the orchestration of a whole sequence. Single-word naming centers on lexical retrieval and articulation of a single target, not sequence planning, and prosody rating assesses rhythm and intonation, which don’t directly probe multi-phoneme sequencing.