Summary: Genetic Differences

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Genetic differences also can impact on aggressiveness. Differences in temperament can be observed shortly after birth, even among siblings in the same family. These traits may endure into adulthood (DiLalla & Gottesman, 1991). The theory that aggression stems from frustration, suggests that, aggression stems from frustration resulting from a person experiencing a blockage or interference in attaining a goal. The greater the motivation to achieve the goal, the greater the frustration. Frustration can build up until it is released on the source of the frustration or displaced on another object or person (Dill & Anderson, 1995). Social psychologists distinguish between types of frustration that may provoke an aggressive response. If the frustration
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