Researchers from the University of Parma conducted an experimental study examining whether dogs’ blinking patterns are influenced by observing humans blink. The investigation was designed to isolate the effect of human blinking from other elements typically present during natural social interaction, a distinction that had not been examined in previous research.
The study analyzed 35 dogs of various breeds as they watched video recordings featuring their owners and unfamiliar individuals. Each video segment lasted 40 seconds and presented two conditions: one in which the on-screen humans blinked approximately once every three seconds, and another in which they maintained a steady gaze without blinking. The researchers recorded and analyzed the dogs’ blinking responses under both conditions.
Results indicated that dogs increased their blinking frequency when viewing humans who were blinking compared to those maintaining a still gaze. However, further analysis revealed this increased blinking occurred specifically when dogs observed their owners blinking rather than strangers, indicating the social relationship between the dog and the human affects the response. The researchers found no evidence that dogs synchronized their blinking with human blinking patterns.
According to the lead researcher, the findings suggest blinking may have developed social significance beyond its primary biological function of eye protection and lubrication. The research indicates dogs demonstrate sensitivity to blinking as a social cue and adjust their own blinking behavior based on the identity of their interaction partner. However, researchers cautioned against interpreting individual dog blinks as deliberate communication with specific meanings, noting instead that blinking appears to provide subtle feedback about attention or engagement in social contexts.
The study was published in Royal Society Open Science. Experts noted the research demonstrates dogs’ sensitivity to subtle facial cues while acknowledging limitations regarding whether dogs use blinking as an intentional communicative mechanism.
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