A) Boxplots of mean pitch (F0 Hz) computed across all sentences spoken with each individual emotion (abcissa) by the two talkers and the two material types (shown in the four panels). B) As in Fig. 1A, but showing boxplots of mean intensity (dB SPL). C) As in Figs. 1A and 1B, but showing the ratio of mean pitch computed for each emotion to the mean pitch computed for the neutral emotion (F0ratio). D) As in Figs. 1A, 1B and 1C, but showing the difference in intensity (dB) between individual emotions and the neutral emotion. A-angry, H-happy, Ne-neutral, S-sad, Sc-scared. ADSF-female talker, adult-directed material; ADSF/CDSF, adult/child-directed speech, female talkers; ADSM/CDSM, adult/child-directed speech, male talkers.