Social Psychological Explanations of Aggression

The AQA specification names three social psychological explanations of human aggression. Each one locates the cause of aggression in a person's environment and social experience rather than in their biology, and each is examined regularly on Paper 3.

Explanation	Core idea	Key names
Frustration-aggression hypothesis	Being blocked from a goal creates an aggressive drive	Dollard et al.; Berkowitz
Social learning theory	Aggression is learned by observing and imitating models	Bandura
De-individuation	Anonymity in a crowd lowers inhibitions against aggression	Zimbardo

A social psychological explanation accounts for behaviour in terms of other people, groups and situations. This is what distinguishes these accounts from the biological explanations (neural, hormonal, genetic and evolutionary) covered elsewhere in this topic. A strong answer can describe each explanation accurately and then evaluate it, so this lesson builds up all three before turning to a full AO3 evaluation.

Aggression here means behaviour intended to harm another person. The three explanations differ in why that behaviour occurs: a blocked drive, learned imitation, or lost identity in a crowd.

Dollard et al. (1939) proposed that aggression is always the result of frustration, and that frustration always leads to some form of aggression. Frustration occurs when a person is prevented from achieving a goal. This blocking creates an aggressive drive, which builds up until it is released as aggression.

Two further ideas are central to the original hypothesis:

• Displacement — if the source of frustration cannot be attacked (because it is unavailable, too powerful, or too abstract), the aggressive drive is redirected onto a substitute target. For example, an employee frustrated by a manager they cannot confront may go home and shout at a family member instead.
• Catharsis — expressing the aggression is thought to release the built-up drive, so that the aggressive urge is reduced afterwards.

Worked example. A student fails an exam they revised hard for. They cannot attack the exam or the marker (both abstract or unavailable), so under this hypothesis the aggressive drive is displaced: they slam a door or snap at a friend. The frustration created the drive; displacement chose the target; catharsis is meant to follow.

Frustration → aggressive drive → aggression. When the true source cannot be attacked, the aggression is displaced onto a substitute target.

The original hypothesis was too rigid, so Berkowitz (1989) reformulated it. He argued that frustration creates only a readiness for aggression — a negative emotional state best described as anger — rather than aggression itself. Whether that anger becomes actual aggression depends on environmental cues.

An aggressive cue is a feature of the situation associated with aggression or violence. The presence of such a cue makes aggression more likely; without it, the anger may not be acted on.

The classic evidence is the weapon effect. Berkowitz and LePage (1967) found that participants who had been made angry gave more electric shocks when a weapon (a rifle and revolver) was present in the room than when neutral objects were present. The weapon acted as an aggressive cue, priming the aggressive response.

Version	What frustration produces	What else is needed
Dollard et al. (1939)	Aggression directly	Nothing further
Berkowitz (1989)	Readiness for aggression (anger)	Aggressive environmental cues

Berkowitz's key correction: frustration alone is not enough. Frustration produces anger, and anger becomes aggression only when aggressive cues are present in the environment.

Bandura argued that aggression, like other behaviours, is learned rather than driven by an internal urge. People acquire aggressive behaviours by observing and imitating role models, particularly models who are similar, high-status or powerful.

Learning depends on two further mechanisms:

• Vicarious reinforcement — the observer does not need to be rewarded themselves. Seeing a model rewarded for aggression makes imitation more likely; seeing a model punished makes it less likely.
• Self-efficacy — the observer's confidence that they can carry out the aggression successfully and that it will bring a reward. A child who has aggressed successfully before has high self-efficacy for aggression and is more likely to repeat it.

The central evidence is Bandura's Bobo doll studies. Children who watched an adult model behave aggressively towards an inflatable Bobo doll later imitated the specific aggressive acts they had seen — the same hitting, kicking and verbal aggression — far more than children who had not seen the model. A later variation showed that children who saw the model rewarded imitated more than those who saw the model punished, demonstrating vicarious reinforcement.

Four processes underpin observational learning of aggression: attention to the model, retention of what was seen, reproduction of the behaviour, and motivation (driven by vicarious reinforcement and self-efficacy).

De-individuation is a psychological state in which a person loses their sense of individual identity and personal responsibility. It typically occurs when someone is anonymous within a large group or crowd. Losing individual identity means reduced self-awareness and accountability, which lowers the normal inhibitions that restrain aggression and makes aggressive behaviour more likely.

The idea draws on the crowd behaviour tradition: in a crowd, people feel they cannot be identified or held responsible as individuals, so the private standards that usually control behaviour weaken.

Zimbardo's work supports this. In one study, participants made anonymous — hooded and wearing coats that hid their identity — delivered more and longer electric shocks to a confederate than participants who were identifiable by name and normal clothing. Anonymity, not personality, drove the difference.

Several situational factors increase de-individuation:

Factor	Why it increases de-individuation
Anonymity	The individual cannot be identified, so feels less accountable
Uniforms	Hide individual identity and merge people into a group
Darkness	Reduces the chance of being recognised
Crowd size	The larger the group, the more the individual is submerged in it

De-individuation does not create a desire to be aggressive. It removes the inhibitions against it by stripping away individual identity and accountability.

A top-band answer weighs the strengths and limitations of each explanation. Aim for a few developed points rather than many one-line ones.

Frustration-aggression: supported but too simple. There is supporting evidence that frustration increases aggression, but the original hypothesis is too simplistic. Not all frustration produces aggression (some people respond with despair or withdrawal), and not all aggression follows frustration (some is proactive or learned). Berkowitz's reformulation — frustration produces anger, which becomes aggression only with aggressive cues — accounts for this far better and is more valid. The catharsis claim is poorly supported: acting aggressively often increases later aggression rather than reducing the drive.

Social learning theory: strong evidence and real-world application. The Bobo doll studies show observational learning of specific aggressive acts, and the theory explains media effects (children imitating aggression they see on screen) and cultural differences in aggression, since different cultures model and reward aggression differently. However, much of the evidence comes from artificial laboratory studies: hitting a Bobo doll is not the same as real interpersonal aggression, so the studies may lack ecological validity.

De-individuation: supported but context-dependent. There is supporting evidence — Rehm et al. (1987) found that handball teams wearing the same uniform played more aggressively than teams in their own clothes, and crowd and riot behaviour fits the model. But de-individuation does not always increase aggression. Anonymity can also increase prosocial behaviour when the group's norms are prosocial, so the effect depends on the norms of the situation rather than anonymity alone.

Across all three, a useful overall evaluation: these explanations are less reductionist than biological accounts and capture the social context of aggression well, but by focusing on the situation they can downplay biological and genetic factors that also contribute.

1. Saying all frustration leads to aggression

The original hypothesis claimed this, but Berkowitz showed frustration only creates a readiness (anger). Aggression also needs environmental cues, such as the weapon effect. State the reformulation to show you understand the limitation.

2. Forgetting displacement onto a substitute target

A common error is describing frustration and aggression but omitting displacement. When the source of frustration cannot be attacked, the aggression is redirected onto a substitute target. Leaving this out misses a defining feature of the hypothesis.

3. Treating the Bobo doll as real aggression

Hitting an inflatable doll is not genuine interpersonal aggression, which is why the Bobo doll studies are criticised for lacking ecological validity. Use this as an evaluation point rather than presenting the study as proof that observation directly causes real violence.

4. Assuming de-individuation always increases aggression

De-individuation removes inhibitions, but the outcome depends on the group's norms. Anonymity can increase prosocial behaviour when norms are prosocial (for example, Rehm's findings are about aggression, but other studies show anonymity boosting helping). The effect is context-dependent, not automatic.

5. Mixing up vicarious reinforcement with direct reinforcement

Vicarious reinforcement means the observer imitates because they saw someone else rewarded. It does not mean the observer was rewarded themselves — that is direct reinforcement and belongs to operant conditioning, not social learning theory.