What is a common method for measuring the severity of AOS?

• A. Use intelligibility-only ratings
• B. Use intelligibility and severity ratings across spontaneous and elicited speech tasks, along with error patterns and consistency
• C. Use only self-report
• D. Use only reaction time

Answer: (B)

Severity of apraxia of speech is best captured by a multi-dimensional approach that combines how understandable the speech is with the motor characteristics of the errors, across different speaking tasks. Clinicians rate intelligibility and overall severity across both spontaneous speech (like conversation or storytelling) and elicited tasks (such as reading aloud or repeating syllables), then examine the specific error patterns—what kinds of distortions, substitutions, or groping occur—and how consistent those errors are from trial to trial and across tasks. This fuller picture matters because intelligibility alone doesn’t reveal how severe the motor planning and programming problems are, and performance can vary by task. Looking at error types and their consistency helps distinguish AOS from other speech disorders and guides treatment planning. Self-report or reaction-time measures on their own don’t provide enough detail about the motor-severity profile.