4.2.2 Acoustical evaluation Figure 7 presents deviant coarticulation, speech sound distortion, searching articulation, and token-to-token variability of the model’s productions after asymptotic imitation learning as a function of the severity of the two deficits. In general, the results show increased severity of the selected speech symptoms for both deficits, but the increase is much larger for MPD than for MPD+APD.