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a A pair of common marmosets with two infants. (Copyright, Francesco Veronesi; used under Creative Commons license.) b, c Waveform and spectrogram of an example phee call exchange. Used with permission from Takahashi et al. [2013]. d Schematic of a cross-correlation plot demonstrating the temporal structure underlying turn taking in marmosets and humans. Note the difference in timescales, whereby the first peak of the cross-correlation is at 10 s for marmosets and 0.2 s for humans.
