Which result most directly demonstrates meaningful change in AOS therapy?

• A. Increased speaking rate without loss of intelligibility.
• B. More consistent vowel production across sessions.
• C. Improved intelligibility and consistent production of longer, more complex utterances with accurate sequencing.
• D. Enhanced articulation of singleton phonemes.

Answer: (C)

Meaningful change in AOS therapy is best demonstrated when the person communicates more clearly in real conversation, not just showing isolated motor gains. The strongest indicator is improved intelligibility together with the ability to produce longer, more complex utterances with accurate sequencing. This shows that the motor planning and programming problems at the heart of AOS are becoming more functional across words and sentences, reflecting genuine improvement in everyday communication.

Faster speech without sacrificing intelligibility can be tempting, but rate alone doesn’t guarantee meaningful progress if the listener’s understanding isn’t reliably improved. Consistency in vowel production across sessions helps phonetic stability, yet it doesn’t by itself demonstrate better connected speech. Focusing on single phoneme articulation highlights precision at the sound level but doesn’t capture the ability to assemble speech into fluent, intelligible phrases and sentences.