Motor Speech AOS Practice Test 2026 - Free Apraxia of Speech Practice Questions and Study Guide

In diadochokinetic tasks for apraxia of speech, the key difference is sequencing versus repetition. SMR requires rapid transitions between different articulatory targets (for example, pa-ta-ka), which heavily taxes motor planning and the ability to sequence movements. Those sequencing demands tend to produce more errors and slower rates in AOS, especially at the transitions between sounds. AMR, on the other hand, involves repeating the same syllable quickly (pa-pa-pa), which relies more on executing a single gesture and is typically less affected by the sequencing problems characteristic of AOS. So, SMR is usually more challenging than AMR in individuals with AOS.