09 July 2018
Many animals, including sea lions and dogs, can accurately predict the size and strength of a potential adversary in part by listening to their vocalisations – such as the ferocity and depth of their barks or growls.
People weren’t thought to be much good at doing something similar. But in previous studies, volunteers were asked to judge the absolute height and strength of another person, based on the sound of an aggressively-spoken sentence or a ‘roar’.
Now in a new study, published in iScience, when participants were instead instructed to listen to recordings and judge how much stronger, or weaker, taller or shorter the vocaliser was, compared with themselves, they could do this with a high degree of accuracy.
As the researchers, led by David Reby at the University of Sussex, point out, this is potentially far more practically useful than being able to discern someone else’s absolute height or strength.