Related topics: children · adolescents

Researchers identify molecular mechanism of cancer invasion

A cancerous tumor is the accumulation of cells uncontrollably dividing, some of which can invade other parts of the body. The process is difficult to predict in detail, and eradicating the cells poses even greater difficulty.

Female Gila monster fights surprisingly violent, study finds

A new study published on May 10 in the journal Royal Society Open Science has shown that in the Gila monster, a large venomous lizard, encounters between females are far more intense and violent than interactions between ...

Women want to ride a bike without fear of injury and harassment

Despite the health and environmental benefits of getting on a bike, in Melbourne, twice as many men ride bikes as women. A new study by Monash University has uncovered both why this is the case, and how it can be reversed.

Whales give up singing to fight for love

Male whales along Australia's eastern seaboard are giving up singing to attract a mate, switching instead to fighting their male competition.

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 pain or harm. 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 should not be confused with assertiveness, although the terms are often used interchangeably among laypeople, e.g. an aggressive salesperson.

There are two broad categories of aggression. These include hostile, affective, or retaliatory aggression and instrumental, predatory, or goal-oriented aggression. Empirical research indicates that there is a critical difference between the two, both psychologically and physiologically. Some research indicates that people with tendencies toward affective aggression have lower IQs than those with tendencies toward predatory aggression. If only considering physical aggression, males tend to be more aggressive than females. One explanation for this difference is that females are physically weaker than men, and so need to resort to other means.

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