Farago, T., Pongracz, P., Miklosi, A., Huber, L., Viranyi, Zs., Range, F.
Title of Experiment:
Dogs’ Expectation about Signalers’ Body Size by Virtue of Their Growls (Category: Communication, Animal Species: dog)
Eötvös Loránd University, Department of Ethology Budapest, Hungary
Department of Cognitive Biology, University of Vienna, Vienna, Austria
Clever Dog Lab, Vienna, Austria
Several studies suggest that dogs as well as primates utilise a mental representation of the signaller after hearing its vocalization, and can match this representation with other features provided by the visual modality. Recently it was found that a dogsâ growl is context specific, and contains information about the callerâs body size. Whether dogs can use the encoded information is as yet unclear. In this experiment, we tested whether dogs can assess the size of another dog if they hear an agonistic growl paired with simultaneous video projection of two dog pictures. One of them matched the size of the growling dog, while the other one was either 30% larger or smaller. In control groups, noise, cat pictures or projections of geometric shapes (triangles) were used. The results showed that dogs look sooner and longer at the dog picture matching the size of the caller. No such preference was found with any of the control stimuli, suggesting that dogs have a mental representation of the caller when hearing its vocalization.
Dog Canis familiaris vocal communication cross-modal matching size communication