phaidra.vetmeduni.ac.at o:2111 DOI 10.1016/j.isci.2022.104801 Pupil size changes reveal dogs’ sensitivity to motion cues Certain motion cues like self-propulsion and speed changes allow human and nonhuman animals to quickly detect animate beings. In the current eye-tracking study, we examined whether dogs' (Canis familiaris) pupil size was influenced by such motion cues. In Experiment 1, dogs watched different videos with normal or reversed playback direction showing a human agent releasing an object. The reversed playback gave the impression that the objects were self-propelled. In Experiment 2, dogs watched videos of a rolling ball that either moved at constant or variable speed. We found that the dogs' pupil size only changed significantly over the course of the videos in the conditions with self-propelled (upward) movements (Experiment 1) or variable speed (Experiment 2). Our findings suggest that dogs orient toward self-propelled stimuli that move at variable speed, which might contribute to their detection of animate beings. eng Biological Motion; Perception; Animacy; Agency; Speed; Attribution; Movement 2023-09-19T09:40:47.356Z LOMv1.0 Author BEGIN:VCARD VERSION:3.0 N:Völter;Christoph J.; FN:Christoph J. Völter X-ORCID:https://orcid.org/0000-0002-8368-7201 END:VCARD BEGIN:VCARD VERSION:3.0 N:Huber;Ludwig; FN:Ludwig Huber X-ORCID:https://orcid.org/0000-0002-0217-136X END:VCARD https://w3id.org/kim/hcrt/scheme https://w3id.org/kim/hcrt/text Textdokument Text LOMv1.0 yes https://creativecommons.org/licenses/by/4.0 application/pdf 2062439 https://phaidra.vetmeduni.ac.at/o:2111 https://phaidra.vetmeduni.ac.at/api/object/o:2111/thumbnail LOMv1.0 discipline