Why is it important to record and analyze error types (substitutions, distortions, additions) during AOS assessment?

• A. It helps track memory function
• B. It helps characterize the motor planning deficits and guide targeted therapy
• C. It is unnecessary
• D. It helps assess hearing

Answer: (B)

Recording and analyzing error types in AOS assessment shows how motor planning and sequencing break down when speech is prepared and produced. Substitutions reflect selecting the wrong phoneme from the planned sequence, distortions reveal imperfect articulation of planned movements, and additions indicate extra gestures sneaking into the plan. By documenting these patterns across tasks, you can distinguish AOS from other speech disorders and tailor therapy to rebuild the underlying motor plans and their correct sequencing. This approach also lets you track progress over time, adjusting targets and cues as the error profile changes, so treatment stays focused on improving planning rather than just practicing sounds. While memory or hearing issues can influence communication, the main value here is mapping the planning impairments that drive the errors to guide precise therapy.