Maximum performance tasks include measures of maximum phonation duration and maximum repetition rates. These tasks help the SLP to determine if the child presents with which of the following impairments?

• A. Verbal dyspraxia
• B. Ankyloglossia
• C. Submucous cleft
• D. Oral dyspraxia

Answer: (A)

These tasks target motor speech planning and coordination for speech movements. Maximum phonation duration checks how well the laryngeal system can sustain voice, while maximum repetition rates (diadochokinetic tasks) test how quickly and accurately the articulators (lips, tongue, jaw) can sequence rapid movements. When a child has verbal dyspraxia, the core difficulty is planning and programming the precise sequence of articulatory movements needed for speech, especially in rapid or complex sequences. This shows up as slower, more variable, and less accurate performance on rapid syllable repetition tasks, indicating a breakdown in motor planning for speech rather than a purely structural limitation.

Ankyloglossia would constrain tongue movement due to a physical tether, not primarily reflect planning of speech sequences. Submucous cleft affects resonance and velopharyngeal function, which alters nasal emission or hypernasality rather than the ability to plan and execute rapidly coordinated speech movements. Oral dyspraxia refers to a similar planning issue, but the assessment focus here aligns with verbal dyspraxia (apraxia of speech), which is diagnosed based on impaired motor planning for speech sequences demonstrated by these kinds of measures.