Table 1.

Mean and standard deviation for latency, composite, and spectral measures.

	Control	PDS	P value
Latency measures (ms)
V	6.57 (0.09)	6.75 (0.24)	0.002
A	7.54 (0.18)	7.80 (0.41)	0.008
D	22.57 (0.44)	22.73 (0.45)	0.22
E	30.91 (0.33)	31.09 (0.41)	0.11
F	39.58 (0.46)	39.63 (0.44)	0.55
O	48.08 (0.25)	48.41 (0.36)	0.001
Composite measures
VA duration (ms)	0.96 (0.12)	1.06 (0.24)	0.09
VA amp (μV)	0.31 (0.08)	0.28 (0.10)	0.21
VA slope (ms/lV)	−0.33 (0.08)	−0.27 (0.09)	0.02
Spectral measures (μV)
F0	0.0480 (0.024)	0.0483 (0.017)	0.95
F1	0.0088 (0.003)	0.0074 (0.002)	0.07
HF	0.0036 (0.001)	0.0032 (0.001)	0.34

PDS: persistent developmental stuttering.