Table 2. Song parameters in different recording nights and context regions in night 1 and nights 2, 3, 4.

Shown is the mean ± sd and the p-value of pairwise comparisons (Wilcoxon signed rank and rank sum tests) for the different recording nights (a), and context regions in night 1 (b) and nights 2, 3, and 4 (c).

		Mean of groups ± sd				Pairwise comparisons(1)
	Parameter	night 1	night 2	night 3	night 4	n1-n2	n1-n3	n1-n4	n2-n3	n2-n4	n3-n4
a)	# of songs	26.67 ± 10.94	119.20 ± 107.20	58.27 ± 61.52	44.17 ± 37.43	< 0.001	0.007	0.171	0.007	0.036	0.528
	soDur	320.79 ± 381.97	263.65 ± 365.91	307.90 ± 409.49	301.97 ± 372.70	< 0.001	0.064	0.359	0.003	0.003	0.149
	# of syls(2)	3.50 ± 3.06	2.77 ± 2.57	3.06 ± 2.83	3.16 ± 2.68	< 0.001	0.031	0.402	0.037	0.006	0.224
		FR	NR	CC	CR	FR-NR	FR-CC	FR-CR	NR-CC	NR-CR	CC-CR
b)	# of songs	3.92 ± 2.94	4.08 ± 2.88	17.7 ± 9.66	3.92 ± 2.61	0.893	0.019	1.000	0.023	0.851	0.031
	soDur	270.27 ± 423.52	126.12 ± 251.53	419.41 ± 393.50	202.89 ± 281.76	0.021	< 0.001	0.378	< 0.001	0.195	< 0.001
	# of syls	2.92 ± 3.03	1.94 ± 2.14	4.29 ± 3.18	2.70 ± 2.53	0.013	< 0.001	0.453	< 0.001	0.138	< 0.001
c)	# of songs	6.70 ± 5.77	10.67 ± 11.11	40.75 ± 24.06	136.5 ± 148.2	0.036	0.003	< 0.001	0.007	0.003	0.009
	soDur	144.25 ± 142.29	129.45 ± 208.96	500.88 ± 493.89	229.90 ± 326.63	0.089	0.362	< 0.001	< 0.001	< 0.001	< 0.001
	# of syls	1.99 ± 1.08	1.70 ± 1.20	4.70 ± 3.60	2.47 ± 2.17	0.009	0.585	< 0.001	< 0.001	< 0.001	< 0.001

⁽¹⁾ Significance level after Bonferroni correction: p < 0.0083;

⁽²⁾ syls = syllables.