Table 1.

Standardized coefficients and relative contribution to the full model of each acoustic predictor of distress ratings (^∗p < 0.05, ^∗∗p < 0.001).

Predictors	Standardized (β) coefficient	p-value
Intercept	47.0	<0.00001
Duration (ms)	8.0	0.003∗∗
Average pitch (f0)	6.2	0.13
Max pitch (f0)	−1.8	0.67
Max amplitude (RMS)	2.4	0.28
Spectral ratio	−6.9	0.10
Spectral mean	2.3	0.65
Spectral dispersion (SD)	2.4	0.59
Periodicity	1.6	0.64
Number of regimes	9.1	0.03∗