Final answer:
There are two types of human intergroup aggression: hostile aggression and instrumental aggression. Bullying is another form of aggression that can be considered intergroup aggression. However, girls tend to engage in indirect, social forms of aggression, while boys engage in direct, physical aggression.
Step-by-step explanation:
There are two types of human intergroup aggression: hostile aggression and instrumental aggression. Hostile aggression is motivated by feelings of anger with the intent to cause pain. For example, a fight in a bar with a stranger is an example of hostile aggression. Instrumental aggression, on the other hand, is motivated by achieving a goal and does not necessarily involve intent to cause pain. For instance, a contract killer who murders for hire displays instrumental aggression.
Bullying is another form of aggression that can be considered intergroup aggression. Bullying is repeated negative treatment of another person over time and can include physical, verbal, or psychological attacks. It's important to note that girls and boys tend to display different types of bullying behavior. Boys typically engage in direct, physical aggression, while girls tend to engage in indirect, social forms of aggression.
Overall, intergroup aggression can vary depending on motives, such as anger or achieving a goal, and can manifest in different ways, such as physical or verbal attacks.