Table 1.

Results of the statistical analyses of the song behavior data

Three-way ANOVAs
	Percent Time Singing			Ratio of Singing to Calling			Mean Song Duration			No. of Notes Per Song			Song Energy (Loudness)
	F (3,68)	p	η 2	F (3,68)	p	η 2	F (3,68)	p	η 2	F (3,68)	p	η 2	F (3,68)	p	η 2
Sex	8.792	0.004**	0.114	7.620	0.007**	0.101	2.518	0.117	0.036	5.515	0.022*	0.075	11.299	< 0.001***	0.142
Dose	3.438	0.022*	0.132	5.532	0.002**	0.196	6.208	< 0.001***	0.218	6.927	< 0.001***	0.234	3.235	0.028*	0.125
Week	5.891	0.018*	0.080	6.954	0.010*	0.093	4.386	0.040*	0.061	7.268	< 0.001***	0.097	4.324	0.041*	0.060
Sex * Dose	0.434	0.729	0.019	0.173	0.914	0.008	0.276	0.842	0.012	0.162	0.922	0.007	0.899	0.451	0.038
Sex * Week	1.205	0.276	0.017	2.586	0.112	0.037	4.635	0.035*	0.065	4.235	0.043*	0.059	0.026	0.871	0.000
Dose * Week	0.600	0.617	0.026	0.442	0.724	0.019	0.778	0.510	0.034	0.582	0.629	0.025	1.231	0.305	0.052
Sex * Dose * Week	0.511	0.676	0.022	0.204	0.893	0.009	0.549	0.651	0.024	0.966	0.414	0.041	0.544	0.654	0.023

Four-way ANOVAs
	Percent Time Singing			Ratio of Singing to Calling			Song Energy (Loudness)
	F (6,408)	p	η 2	F (6,408)	p	η 2	F (6,408)	p	η 2
Day	23.980	< 0.001***	0.261	29.787	< 0.001***	0.305	15.172	< 0.001***	0.182
Day * Sex	5.761	< 0.001***	0.078	1.945	0.104	0.028	6.868	< 0.001***	0.092
Day * Dose	1.150	0.327	0.048	0.948	0.499	0.040	1.559	0.108	0.064
Day *Week	31.807	< 0.001***	0.319	24.277	< 0.001***	0.263	10.108	< 0.001***	0.129
Day * Sex* Dose	0.924	0.511	0.039	1.513	0.120	0.063	1.349	0.195	0.056
Day * Sex * Week	5.589	< 0.001***	0.076	4.095	0.003**	0.057	7.312	< 0.001***	0.097
Day * Dose * Week	2.263	0.016*	0.091	1.544	0.109	0.064	1.157	0.316	0.049
Day * Sex * Dose * Week	1.741	0.073	0.071	0.622	0.821	0.027	1.849	0.044*	0.075