Table 3.

Consistency parameters in spontaneous and reactive song of skylarks (N = 16)

	Spontaneous, mean ± SD	Reactive, mean ± SD	F	p
Coefficient of variation
CV syllable duration	0.06 ± 0.04	0.06 ± 0.05	F 1,75 = 0.17	0.68
CV gap duration	0.13 ± 0.09	0.11 ± 0.08	F 1,72 = 1.42	0.24
CV sound density	0.05 ± 0.03	0.04 ± 0.02	F 1,72 = 2.66	0.11
CV MPF	0.08 ± 0.06	0.05 ± 0.04	F 1,75 = 6.39	0.01 a
Spectral cross-correlation
CCF	0.75 ± 0.15	0.76 ± 0.16	F 1,75 = 0.132	0.72

Test statistics of GLMMs. Significant p values are given in italics

^aDifference remains significant when retesting with the subset of 12 subjects for which recordings were made with a delay of 1 day at most