Table 4.

Comparison of correlations between acoustic variables and heart period for vole vocalizations (n=23) and 6 month human infants (n=75; see [27]). Correlation coefficients are shown below.

Acoustic variable	Infant	Vole
Fundamental Frequency	−.368**	− 571***
50% Bandwidth	−.334**	−.144
Variance	−.610**	−.347*
Duration	−.402**	−.505**

^*Pearson correlation, p < 0.10

^**Pearson correlation, p < 0.05

^***Pearson correlation, p < 0.01 (2-tailed).