TABLE 2.

Standard Deviations of Acoustic Measurements for Two Sets of Control Stimuli, Stimuli from the Current Study, and Those Used in Rost and McMurray (2009) (Numbers with asterisks were significantly different from the present stimuli according to Levene’s test for equality of variance. Numbers in parentheses represent stimuli from Experiment 3 of Rost & McMurray, 2010)

Acoustic Dimensions	Control A	Control B	Present Stimuli	Rost and McMurray
Mean Pitch (Hz)	28.76	75.06	37.73	77.54*
Duration (ms)	41.55*	42.30*	203.65	112.03*(101.86*)
Pitch Excursion (Hz)	70.76	28.10	64.48	137.22*
Pitch Direction (Hz/ms)	3.49	3.85	6.67	9.57*
Harmonic/noise ratio (dB)	1.79*	1.22*	3.95	3.07*
Spectral Mean (Hz)	175.75	100.59	198.13	151.19*
Spectral Variance (SD)	65.60	35.66*	90.54	59.64*
Spectral Skew	265.50	67.2*	251.34	153.91*
Spectral Kurtosis	67.65	28.53*	88.50	44.10*
Spectral Tilt (dB/kHz)	< 0.001	< 0.001	0.0020	0.0076*

Note. This table references Rost and McMurray (2009, 2010).