A dog’s relationship with its human owner is central to its life, providing food, shelter, affection, and more. This bonded pair spends most of their time together. But how might this close attachment impact how a dog interacts with and judges other people it encounters?
Recent research published in the journal Animals explores this question by investigating whether the strength of a dog’s bond with its owner influences the dog’s evaluation of unfamiliar people who interact with the owner.
The study examined if dogs differently judge prosocial strangers who help their owner versus antisocial strangers who refuse to help. It also tested if the dog’s attachment style predicts its evaluations.
Dogs first observed humans interacting with their owner to help, refuse help, or act neutral. The dogs then chose between these strangers and neutral ones for a food reward. Owners also completed surveys on their dog’s attachment behaviors.
The research aimed to uncover if dog-owner attachment shapes canine social evaluation, as attachment does in human social judgments. The innovative study provided new insights into the cognitive impacts of dog-human bonding.
Dogs Show Preference Towards Helpful Strangers

The study revealed several noteworthy findings regarding how a dog’s bonding to its owner influences its social appraisals.
First, after witnessing the stranger interactions, dogs showed a clear preference for individuals who helped their owner. This may stem from the fact that dogs see their humans as their “pack.”
However, they did not avoid strangers who refused to help their owner.
Additionally, the strength of a dog’s attachment to its owner, measured by the owner’s survey reports, predicted the dog’s evaluation of the prosocial stranger.
Dogs with stronger attachment bonds were more likely to prefer the helper over a neutral stranger.
Conversely, the attachment strength did not predict the dog’s response to the antisocial stranger or a neutral control. More attached dogs did not show greater avoidance of unhelpful people.
Overall, the findings demonstrate that a dog’s attachment to its owner manifests specifically as a positivity bias toward strangers who benefit the owner. Strongly bonded dogs judge prosocial people more favorably.
Significance for Canine Social Cognition

This study’s findings carry important implications for understanding canine social cognition and behavior.
Most notably, the research provides clear evidence that attachment relationships shape dogs’ social evaluation abilities, mirroring effects seen in human social judgment.
The results also help explain the mixed findings of prior studies on dogs’ capacity for social evaluation. Dogs’ varying attachment bonds may underlie whether they succeed at judging prosocial/antisocial people in different experiments.
More broadly, the study highlights how the strength of the dog-owner attachment acts as a key individual factor influencing dogs’ performance on social cognitive tasks.
Dogs with stronger bonds to their owner may have greater social interest and thus exhibit more human-like social evaluation abilities.
Additionally, these findings give insight into the pervasive influence the dog-human relationship has on various aspects of canine psychology and behavior.
Further research can build on this work exploring how attachment style modulates social cognition across dog populations and individuals.
Prosocial Strangers Earn Preference of Attached Dogs

In summary, this innovative study provides compelling evidence that the bond between a dog and its human owner impacts how the dog judges and evaluates strangers based on their interactions with the owner.
Specifically, dogs with stronger attachment to their owner show a positivity bias, preferring unfamiliar people who behave prosocially toward the owner.
However, attachment does not lead to greater avoidance of unhelpful strangers.
While early socialization plays an important role in how a dog behaves around strangers, these findings highlight the impact the dog-human relationship plays in shaping a dog’s perception, evaluation, and behavior toward new people it encounters.
The owner-dog bond appears to act as a lens through which dogs view and judge the social world around them.
This work adds significantly to our understanding of the widespread impacts attachment has on cognition and social behavior in the canine mind.
It also opens up exciting avenues for future research on the comparative psychology of attachment across species and its surprising effects on social judgments.