Figure 1.

Sample raw data: Kinematic data from a control participant during one production of the following sentence: The boys and the pipers baked moist pumpkin pies. Displacement trajectories from the upper lip and lower lip are plotted under the lower lip velocity signal. In this figure, the vertical lines pass through the velocity peaks of the initial bilabial opening movement for the /b/ in boys and last opening movement for the /p/ in pies to demonstrate segmentation. mm = millimeters; sec = seconds.