Which of the following is a primary clinical characteristic related to phoneme distortions?

• A. Distorted phoneme substitutions.
• B. Prosody abnormalities.
• C. Short periods of error-free speech.
• D. Automatic speech better than propositional.

Answer: (A)

Phoneme distortions reflect the core issue in motor speech planning for speech sounds: the speaker attempts to produce phonemes but the articulation is imperfect, leading to substitutions that are distorted rather than clean, exact sounds. The phrase “distorted phoneme substitutions” directly names this phoneme-level error pattern, which is a hallmark of apraxia of speech when articulatory movements are misprogrammed.

Prosody abnormalities describe rhythm and intonation issues, which can accompany motor speech disorders but are not the defining feature of phoneme distortions. Short periods of error-free speech can occur but are not the primary characteristic tied to phoneme-level distortion. Automatic speech being better than propositional speaks to a fluency pattern rather than the accuracy of phoneme production.