Mechanisms of sensorimotor adaptation in a hierarchical state feedback control model of speech
Fig 7
The effects of changes in model parameters on adaptation.
The experimental data shown as a comparison (black line) is the control group in Kim & Max [19]. For a comprehensive overview of the parameters used in the figure, see Materials and methods. A: AUKF gains (βxx, βQ, βxy), multiplied to the prior covariance matrix (Pxx), process noise matrix Q, and cross covariance matrix (Pxy) accordingly, affected the adaptation rate and extent. Specifically, larger gains produced faster and larger adaptation. B: Increases in the auditory prediction error threshold (γ) reduced the extent of adaptation. C: Reducing the auditory noise scale (ηaud) increased adaptation in FACTS with UKF (dotted lines). However, changes in auditory noise scale had a minimal effect on adaptation in FACTS implemented with AUKF (solid lines). D: Increases in task target noise (ηtarg) did not affect adaptive behavior, but did increase inter-trial variability.