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. Author manuscript; available in PMC: 2013 Jan 15.
Published in final edited form as: Behav Brain Res. 2011 Oct 8;226(2):613–618. doi: 10.1016/j.bbr.2011.10.001

Fig. 1.

Fig. 1

Top panel: Experiment 1 anticipatory USVs across min and day. High levels of variability are due to the random assignment of animals to test groups. Inter-subject variability in USV production has been shown to be high while intra-subject USVs are generally highly stable [46]. Bottom panel: Sum of USVs produced during the 5 min anticipatory period.