According to the study’s researchers: “We aimed to identify demographic and environmental factors associated with aggressive behavior toward people in Finnish purebred pet dogs.” To accomplish this, they collected behavioral data from 13,715 dogs via online questionnaires completed by their owners. They then used a dataset of 9,270 dogs, including 1,791 dogs with frequent aggressive behavior toward people and 7,479 dogs without aggressive behavior toward people, to determine which breed was most prone to aggression. Read on for the full results and see if your dog made the list. RELATED: This Is the Single Deadliest Animal on Earth, According to Data. Probability of aggressive behavior: 0.07 Probability of aggressive behavior: 0.10 Probability of aggressive behavior: 0.11 Probability of aggressive behavior: 0.11 Probability of aggressive behavior: 0.13 Probability of aggressive behavior: 0.14 RELATED: If Your Dog Is Playing With This, Take it Away Immediately. Probability of aggressive behavior: 0.15 Probability of aggressive behavior: 0.15 Probability of aggressive behavior: 0.17ae0fcc31ae342fd3a1346ebb1f342fcb Probability of aggressive behavior: 0.19 And for more useful information sent straight to your inbox, sign up for our daily newsletter. Probability of aggressive behavior: 0.20 Probability of aggressive behavior: 0.21 Probability of aggressive behavior: 0.22 Probability of aggressive behavior: 0.22 Probability of aggressive behavior: 0.23 Probability of aggressive behavior: 0.25 Probability of aggressive behavior: 0.26 Probability of aggressive behavior: 0.26 Probability of aggressive behavior: 0.28 Probability of aggressive behavior: 0.29 Probability of aggressive behavior: 0.30 Probability of aggressive behavior: 0.31 RELATED: If Your Dog Is Doing This, It Could Be a Sign of COVID, New Study Says.