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. Author manuscript; available in PMC: 2006 Dec 14.
Published in final edited form as: Anim Behav. 2005 Oct;70(4):921–935. doi: 10.1016/j.anbehav.2005.02.004

Table 4.

Correlation matrix of continuous song variables

Song duration Song bandwidth Trill duration Trill bandwidth Trill rate Trill index
Song bandwidth 0.544***
Trill duration 0.291*** 0.118
Trill bandwidth 0.158* 0.139 0.411***
Trill rate 0.078 0.063 −0.039 −0.089
Trill index 0.167* 0.142 0.235** 0.576*** 0.763***
Rattle-buzz 0.470*** 0.528*** 0.168* 0.093 −0.017 0.047

Table shows Pearson correlation coefficients, N =179;

**

* P < 0.0001,

**

P < 0.01,

*

P < 0.05