Positive and negative contexts predict duration of pig vocalisations

摘要: Emotions are mental states occurring in response to external and internal stimuli thus form an integral part of animal's behaviour. can be mapped two dimensions based on their arousal valence. Whilst good indicators exist, clear emotional valence, particularly positive still rare. However, positively valenced emotions may play a crucial role social interactions many species thus, understanding how valence is expressed needed. Vocalisations potential indicator as they reflect the state caller. We experimentally manipulated using negative cognitive bias trials, quantify changes pig vocalisations. found that grunts were shorter trials than trials. Interestingly, we did not find differences other measured acoustic parameters between contexts reported previous studies. These results suggest differ sensitivity emotial it important understand similar are, terms able fully when states.