Fig. 1.

Lower lip velocity and displacement traces from one production of “Buy bobby a puppy” from a 5-year-old CWNS. Dashed vertical lines pass through the first and fifth negative opening peak velocities to show how each lower lip and upper lip (not shown) displacement trajectories were segmented for phrase level analyses. Short solid lines on the traces indicate the selection of the opening and closing movements to produce the syllables “Bob” and “pup” for the single movement analyses