AGRESSION

A+

Aggression

Any physical or verbal behavior intended to cause harm or pain to another living being who is motivated to avoid such treatment.

Hostile Aggression

Harmful behavior driven by anger and performed as an end in itself, with the primary objective of inflicting injury or pain.

Instrumental Aggression

Harmful behavior deployed as a calculated means toward obtaining an external objective or reward rather than causing harm for its own sake.

Emotional / Impulsive Aggression

A reactive, hot-blooded response triggered automatically by intense negative affect with minimal foresight or cognitive deliberation.

Cognitive Component of Aggression

The mental schemas, hostile attributional biases, beliefs, and expectations that prime an individual to perceive threats and interpret ambiguous social cues as hostile.

Physical Aggression

Direct bodily actions intended to cause pain, physical damage, or destruction, such as striking, shoving, or using weapons.

Non-physical Aggression

Harmful behaviors designed to inflict psychological, emotional, or social damage without involving direct bodily contact.

Verbal Aggression

Spoken or written communication—such as insults, screaming, or derogatory remarks—intended to demean or emotionally wound another person.

Relational Aggression

Harmful behaviors designed to damage another person's peer relationships, social status, or feelings of acceptance, such as ostracism and spreading rumors.

Bullying

Repeated, unwanted hostile actions over time characterized by an observable or perceived power imbalance between perpetrator and target.

Cyberbullying

Willful, repeated harm carried out using digital communication technologies, text messaging, or social media networks.

Evolutionary Perspective on Aggression

The view that hostile behaviors developed and persisted because they conferred reproductive and survival advantages by helping ancestors secure resources, protect kin, and deter rivals.

Genetic Role in Aggression

Heritable biological factors that account for substantial individual variability in aggressive temperament, often interacting with environmental stressors to influence neurotransmitter functioning.

Amygdala

A limbic system structure involved in processing emotion and detecting threats; elevated reactivity here is closely linked to reactive hostility.

Prefrontal Cortex

The anterior brain area responsible for executive control, decision-making, and emotional regulation, functioning as an inhibitory brake on violent impulses.

Testosterone

A primary androgen hormone associated with dominance-seeking, competitive drive, and reduced fear, which positively correlates with higher rates of aggressive behavior.

Serotonin

A neurotransmitter that stabilizes mood and facilitates behavioral inhibition; low synaptic levels are associated with impaired impulse regulation and reactive violence.

Negative Emotions in Aggression

Aversive internal states—including physical pain, extreme heat, discomfort, and sadness—that evoke physiological arousal and prime hostile tendencies.

Frustration

The unpleasant emotional response triggered when goal-directed activity is blocked or an anticipated reward is withheld.

Frustration-Aggression Theory

The theoretical framework asserting that the thwarting of goal-directed behavior inherently produces readiness to react with hostility.

Displaced Aggression

The redirection of hostile actions onto a more accessible, vulnerable, or non-threatening substitute target when retaliating against the actual provoker is dangerous or impossible.

Catharsis

The psychoanalytic notion that venting pent-up anger through aggressive actions or viewing violent material purges hostile energy, a claim largely refuted by modern empirical psychological research.