A new, massive, gargantuan study published in PLOS One looked at data from 47,444 dogs. The result of the study was a gigantic behavioral map of man’s best friend.

Led by researchers from Virginia Tech and the University of Washington, the study used the Dog Aging Project’s trove of data to figure out what really drives dog behavior. The researchers didn’t just look at breed, either. They took age, sex, region, and whether the dog was neutered or spayed all into account. This provided perhaps the most detailed look yet at what determines a dog’s behavior.

The team grouped behavior into four main categories: fear, attention/excitability, aggression, and trainability. They found that Mixed breeds scored higher on fear, attention, and aggression, but were decently obedient.

Tiny dogs that

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