disease (PD) is known to diminish multi-tasking performance, we examined dual task
interference between speaking and postural stability in 9 individuals with PD, 7 agematched
and 10 healthy young controls. Participants repeated a target utterance and performed a rise
to toes task in both single and dual task conditions. Diphthong transitions were measured
from audio recordings and postural variables reflecting planning, coordination, and stability …