The terms cat people and dog people refer to a person's domesticated pet animal preference. Through research completed at research institutions, it was found that there were differences in character and behaviour between those who prefer cats and those who prefer dogs. It was also found that some people base a significant portion of their identity around their affinity for either cats or dogs. This builds on the perceived dichotomy between cats and dogs as pets in society.[1][2] In some cases, the two terms refer to people's self-identification, regardless of what pets they actually own, if any.[3]