Overview
- Researchers at the University of Vienna published the study in iScience after scanning trained, awake pet dogs using fMRI, with the paper appearing in early August and widely reported on Monday.
- In an eight‑dog experiment, happy human faces produced stronger activity in a right temporal cluster that extended into the caudate nucleus, a brain region tied to reward processing.
- In a separate 12‑dog test, machine‑learning and whole‑brain analyses found distinct activity patterns that separated fearful faces from angry and sad faces, though region‑of‑interest tests did not reliably distinguish anger from sadness.
- Key limitations include small sample sizes, an overrepresentation of companion breeds (many border collies), and the use of static images of unfamiliar people, so results do not prove dogs feel emotions the same way humans do or generalize to all dogs.
- Authors link the findings to domestication and say the next steps are behavioral tasks, multimodal stimuli (voice, body language, scent), and broader dog populations to connect brain signals to real‑world perception and action.