Table 1.

Mean switching rates and relative song evenness measures for focal and second singers. Focal singers showed a significant increase in switching rate in the presence of a second singer, and a trend towards an increase in relative song evenness. Switching rates and relative song evenness were not significantly different between the focal singers and the second singers. Italics indicate results that are significant at α < 0.05.

		mean ± s.d. BEFORE	mean ± s.d. DURING	p-value—two-tailed test
switching rate	focal singer: BEFORE versus DURING (n = 11)	0.11 ± 0.035	0.14 ± 0.033	0.005
	focal singer versus second singer: DURING (n = 9)	0.14 ± 0.033	0.12 ± 0.02	0.4
relative evenness	focal singer: BEFORE versus DURING (n = 11)	0.76 ± 0.12	0.83 ± 0.11	0.06
	focal singer versus second singer: DURING (n = 9)	0.83 ± 0.11	0.83 ± 0.09	0.75