Table 4.

Phase-locking factors

	Entire response (5–180 ms)			Transition (20–60 ms)			Steady state (60–170 ms)
	Younger	Older	p	Younger	Older	p	Younger	Older	p
F0 (80–120 Hz)	0.099 (0.041)	0.065 (0.032)	0.012	0.110 (0.030)	0.079 (0.037)	0.010	0.104 (0.056)	0.065 (0.038)	0.024
H2 (180–220 Hz)	0.071 (0.019)	0.042 (0.026)	0.001	0.062 (0.022)	0.038 (0.018)	0.001	0.081 (0.027)	0.048 (0.033)	0.003
H3 (280–320 Hz)	0.065 (0.026)	0.034 (0.014)	<0.001	0.049 (0.027)	0.030 (0.015)	0.015	0.081 (0.031)	0.040 (0.022)	<0.001
H4 (380–420 Hz)	0.060 (0.027)	0.036 (0.018)	0.005	0.045 (0.017)	0.029 (0.013)	0.004	0.074 (0.038)	0.043 (0.024)	0.008
H5 (480–520 Hz)	0.049 (0.024)	0.029 (0.013)	0.007	0.040 (0.014)	0.026 (0.011)	0.004	0.058 (0.034)	0.034 (0.018)	0.014
H6 (580–620 Hz)	0.027 (0.001)	0.020 (0.007)	0.012	0.025 (0.006)	0.020 (0.007)	0.041	0.030 (0.013)	0.021 (0.009)	0.024
H7 (680–720 Hz)	0.019 (0.004)	0.016 (0.004)	0.074	0.019 (0.004)	0.016 (0.005)	0.095	0.020 (0.006)	0.017 (0.005)	0.131
Overall (70–800 Hz)	0.041 (0.011)	0.027 (0.009)	<0.001	0.038 (0.010)	0.026 (0.008)	<0.001	0.046 (0.014)	0.029 (0.011)	<0.001

Mean phase-locking factor (with SDs; arbitrary units) for the entire response, transition, and steady state in each group, with p values corresponding to the group differences. Phase-locking factors are shown for the F₀, each integer harmonic up to H₇, and averaged across the entire response.