Table 1:

Summary of Clip Features for ID Song and ID Speech

Feature	Song M(SD)	Speech M(SD)	Mann-Whitney Test	Levene’s Test
Pitch (Hz) – Mean	239.5 (18.9)	233.9 (30.2)	U = 82.00 p = 0.792	F = 2.64 p = 0.13
Pitch (Hz) – Standard Deviation	31.5 (6.4)	35.5 (8.7)	U = 92.00 p = 0.492	F = 0.46 p = 0.51
Tempo (Syllables/Second)	2.1 (0.4)	2.6 (0.5)	U = 103.00 p = 0.056	F = 0.15 p = 0.70
Rhythmic Variability (nPVI)	50.7 (5.4)	61.2 (9.1)	U = 106.00 p = 0.022*	F = 0.90 p = 0.36
Saliency of Mouth AVS	1.6 (0.3)	1.4 (0.2)	U = 42.00 p = 0.220	F = 0.00 p = 0.98
Positive Affect (% Smiling)	45.2% (31.0%)	28.8% (32.3%)	U = 75.00 p = 0.313	F = 0.04 p = 0.85
Duration (Seconds)	23.0 (3.6)	18.5 (4.3)	U = 92.00 p = 0.041*	F = 3.06 p = 0.09

Note:

^*p <.05. Mann-Witney and Levene tests are provided as a reference of differences in averages and variance across clip types for the interested reader, but given the low number of clips, these statistical tests should be interpreted with caution as we may be underpowered to detect significant differences.