Fig. 2From: Goats distinguish between positive and negative emotion-linked vocalisationsHeart rate during the playbacks. Mean +/− SE heart rate (HR) during the habituation phase (H1-H9), dishabituation phase (D10-D12) and rehabituation phase (R13). During the habituation phase, HR decreased and did not vary significantly throughout dishabituation and rehabituation. *** p < 0.001; NS = not significantBack to article page