Fig. 2.

(Color online) (a) Scatterplots of utterances of representative participants in the F1 × F2 space at pre- and post-test phases for (left) $\mathsf{V}$, (middle) $\mathsf{A}$, and (right) $\mathsf{VA}$ conditions. (b) Euclidean distance between the produced and reference sounds at the pre- and post-test phases for each participant. (c) Average distance over all participants for each condition.