Which metric most directly signals meaningful change in therapy goals for AOS?

• A. Improved intelligibility and consistent production of longer, more complex utterances with accurate sequencing.
• B. Increased speaking rate without loss of intelligibility.
• C. Longer utterances with improved grammar but unclear sequencing.
• D. Greater variety of prosodic patterns across utterances.

Answer: (A)

Progress in AOS therapy is measured by how much speech becomes understandable in real communication, not just by how fast or how long someone can speak. The best indicator is when intelligibility improves and the speaker can reliably produce longer, more complex utterances with accurate sequencing. This combination shows that motor planning and programming for speech are becoming more stable, allowing for clearer speech across connected speech and more demanding language.

Other changes can look helpful but aren’t as directly tied to meaningful communication. Increasing speaking rate without preserving intelligibility might just mean faster misarticulation. Longer utterances with better grammar but unclear sequencing still leaves the motor planning issues unresolved, so intelligibility may not improve. A broader range of prosodic patterns can enhance naturalness, but without clearer articulation and correct sequencing, overall communication gain remains limited.