To a casual visitor, these can look like odd habits or animal “quirks.” But to animal welfare researchers and zookeepers, ...

Behaviors often include lying, impulsiveness and aggression. Many of those who've exhibited lifelong antisocial, aka sociopathic, behavior -- lying, impulsiveness, aggression, lacking concern for ...

Although most abnormal behaviors, including all stereotypies, indicate poor welfare, some that occur in rare situations are functional and do not indicate a negative situation. There is a wide range ...

Down syndrome (DS) is the most common genetic disorder in live born children arising as a consequence of a chromosomal abnormality. It occurs as a result of having three copies of chromosome 21, ...

Some examples of narcissistic behavior include inflating one’s accomplishments to gain praise, ignoring other people’s feelings, and deliberately taking credit for someone else’s work. Narcissistic ...

The term “abnormal” when it comes to mental health and psychopathology is often taken for granted. You might have taken, or at least heard of, college courses in “abnormal psychology.” What, then, is ...