Table 2. The mean and the standard deviation of 6 rhythm metrics with significant differences between two sessions

Rhythm metrics	Pre-education	Post-education
%V**	44.07 (6.26)	41.38 (5.02)
ΔV**	72.27 (29.80)	65.41 (27.77)
rPVI-V**	79.11 (31.27)	69.63 (29.30)
nPVI-V*	54.68 (11.82)	52.22 (13.21)
VarcoC*	50.03 (11.46)	51.93 (11.81)
nPVI-C*	56.58 (14.32)	59.05 (15.13)

p<.05
p<.001.
%V, proportion of vocalic intervals; ΔV, SD of vocalic intervals; rPVI, raw Pairwise Variability Index; nPVI, normalized Pairwise Variability Index.