Every cat knows that cats are smarter than dogs, and every cat owner knows that cat owners are also smarter than dogs (but not as smart as the cats themselves). Now a new study by associate professor of Psychology at Carroll University Denise Guastello found that the personality differences between cat people and dog people aren’t just an economical way of judging character. Because of the environments they prefer, cat lovers scored higher on intelligence than dog lovers.

“It makes sense that a dog person is going to be more lively, because they’re going to want to be out there, outside, talking to people, bringing their dog,” Guastello said. On the other paw, “…if you’re more introverted, and sensitive, maybe you’re at home reading a book, and your cat doesn’t need to go outside for a walk.”

To read more “proof” that cat owners are smarter than dog owners, just ask any cat owner. To read more about this study, click here.