Polar bear in fatal Alaska attack was in poor health

A polar bear that killed a young mother and her baby last month in western Alaska was likely an older animal in poor physical condition, but tests came back negative for pathogens that affect the brain and cause aggressive ...

Cat-egorizing play and genuine fighting in cats

The behavior of cat interactions has been categorized into playful, aggressive and intermediate groups that may help owners distinguish between play and genuine fighting. The study, published in Scientific Reports, suggests ...

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Aggression

In psychology, as well as other social and behavioral sciences, aggression refers to behavior between members of the same species that is intended to cause humiliation, pain, or harm. Ferguson and Beaver (2009) defined aggressive behavior as "Behavior which is intended to increase the social dominance of the organism relative to the dominance position of other organisms" . Predatory or defensive behavior between members of different species is not normally considered "aggression." Aggression takes a variety of forms among humans and can be physical, mental, or verbal. Aggression exists on a continuum with what is commonly called assertiveness, although the terms are often used interchangeably among laypeople, e.g. an aggressive salesperson.

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