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. Author manuscript; available in PMC: 2008 Mar 1.
Published in final edited form as: Anim Behav. 2007 Mar;73(3):423–432. doi: 10.1016/j.anbehav.2006.09.003

Table 2.

Factor loadings after PCA and varimax rotation of isolation calls for analysis of call variation

Variable Factor 1 Factor 2 Factor 3 Factor 4
Temporal
 D1 −0.07 0.02 0.12 0.93
 D2 −0.03 −0.92 −0.03 0.01
 INT 0.01 0.48 −0.69 0.39
Spectral-Note 1
 MNF1 0.82 −0.26 −0.13 −0.21
 MXF1 0.76 −0.10 −0.16 0.49
 AVGF1 0.90 −0.28 −0.19 −0.10
 PKF1 0.77 −0.08 −0.34 0.03
Spectral-Note 2
 MNF2 0.79 0.35 0.06 −0.17
 MXF2 0.87 −0.03 0.05 0.16
 AVGF2 0.90 0.25 0.08 −0.02
 PKF2 0.77 0.20 0.07 −0.03
Spectro-temporal
 MNT1 −0.07 0.17 0.83 0.28

Call features with loadings of 0.70 or greater in bold.