Bandura's 1961 study: How imitation transmits aggressive behaviour
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Added: 26.01.2026 at 12:22
Summary:
Explore how Bandura's 1961 study reveals the role of imitation in transmitting aggressive behaviour and understand key concepts of Social Learning Theory.
Bandura et al – Transmission of Aggression Through Imitation of Aggressive Models: A Critical Analysis
Across the field of developmental psychology, few studies have captured the imagination—or provoked as much debate—as Bandura et al's 1961 experiment exploring the ways children learn to act aggressively. Understanding where aggression stems from is not merely an academic pursuit; it is a pressing societal issue beset by troubling headlines about violent youth crime or concern over what children are exposed to in the home, at school, or on television. Prior to Bandura, leading psychological perspectives were largely dominated by behaviourists such as Skinner and Watson, who emphasised the importance of direct reinforcement and punishment in learning. The notion that individuals, especially young children, might acquire complex behaviours such as aggression simply through witnessing it, rather than by direct experience, challenged the very foundations of these behaviourist assumptions.
Albert Bandura, along with his colleagues Ross and Ross, carved out new intellectual territory by proposing Social Learning Theory (SLT), which posited that humans—unlike Pavlov’s dogs or Skinner’s pigeons—are surrounded by a myriad of models whose actions we absorb, remember, and potentially reproduce. The Bandura et al 'Bobo doll' experiment of 1961 stands as a seminal study in the British psychology curriculum (appearing in AQA and Edexcel specifications), both for its bold methodology and its far-reaching implications about the role of imitation in transmitting aggression. This essay will examine in detail the theoretical foundations for this research, scrutinise the study’s aims and hypotheses, and engage critically with its methods, results, theoretical significance, and lasting influence.
Theoretical Background
Bandura’s Social Learning Theory represented both a critique and an extension of behaviourism. Classic behaviourism, as laid out by figures like John Watson and Ivan Pavlov, relied on the mechanisms of classical and operant conditioning. This approach suggested that a child’s behaviour is shaped by the direct consequences of their actions: rewards, punishments, or lack thereof. However, behaviourism struggled to explain how individuals learn merely from observing others—without any observable reinforcement or punishment following the observed behaviour.Social Learning Theory proposed a vital cognitive component to learning. Bandura argued that learning involves attention (noting the model's behaviour), retention (remembering what was seen), reproduction (capability to imitate), and motivation (having a reason to imitate). Crucially, observation could lead to learning even in the absence of any direct outcome for the observer.
When considering aggression—a behaviour that can be physical (hitting, kicking), verbal (insulting, shouting), or indirect (spreading rumours)—environmental factors appeared to be crucial, especially during early childhood. Prior to Bandura’s contribution, aggression was often ascribed to innate drives (as in Freud’s concept of Thanatos), or as a byproduct of frustration (Dollard’s frustration-aggression hypothesis). Yet little experimental research had addressed the possibility that children could acquire aggressive behaviour purely by watching others act aggressively, in everyday environments like the home or school.
Research Aims and Hypotheses
Bandura et al set out with a simple yet powerful aim: to test whether children exposed to aggressive role models would imitate such behaviour even in new contexts, absent the original model. His study made several key predictions. First, that children exposed to an aggressive model would subsequently show more aggressive behaviour than those exposed to a non-aggressive model or no model at all. Second, that non-aggressive models might actively supress aggression. Third, that children would be more likely to imitate a model of their own gender, reflecting the development of gender schemas around what is deemed appropriate conduct. Lastly, Bandura hypothesised that boys—owing perhaps to cultural stereotypes of masculinity—would show greater levels of imitated aggression than girls.Methodology
Participants and Sampling
The sample comprised 72 children (36 boys and 36 girls) aged between 3 and 6 years, recruited from the Stanford University nursery school—a form of opportunity sampling common at the time. In a UK context, this is analogous to using a local nursery class or infant school, as often occurs in psychology student projects. Ethical standards in 1961 were far less stringent than those enforced today, and the use of young children as participants, exposed to overtly aggressive behaviour, would now provoke intense debate regarding potential distress and the long-term effects of such exposure.Experimental Design and Control
A matched pairs design was deployed to ensure internal validity. Children’s baseline levels of aggression were rated by nursery teachers, allowing the researchers to assign children among the experimental (aggressive model), control (non-aggressive model), and baseline (no model) groups while keeping prior aggression scores even across conditions. This pre-emptively countered the argument that natural temperament, rather than experimental manipulation, accounted for later aggression.The key independent variables were: (1) the style of behaviour modelled (aggressive, non-aggressive, or absent), (2) the gender of the model, and (3) the gender of the child. The main dependent variable was the quantity and nature of aggression exhibited by the child following exposure to the model.
Materials and Setting
The Bobo doll—a large inflatable toy that rights itself when knocked over—provided the perfect, ethically acceptable target for measuring aggression without inflicting harm. The experiment unfolded in a staged nursery suite: one room for the modelling, another to induce mild frustration (aggressive arousal), and a third containing both aggressive and non-aggressive toys for the observation phase. By maintaining rigid consistency between sessions (same toys, instructions, duration), extraneous variables were kept to a minimum.Detailed Procedure
Children watched an adult (either male or female) interact with the toys. In the aggressive condition, the adult carried out distinctive acts such as punching, kicking, and hitting the Bobo doll with a mallet, while delivering set verbal phrases (e.g., “Pow!”). The non-aggressive model, by contrast, quietly played with other toys, pointedly ignoring the Bobo doll. In the control group, there was no adult model present.Following this, all children were subjected to mild frustration: they were briefly allowed to play with attractive toys, which were then taken away, ostensibly “reserved for other children.” Finally, they spent 20 minutes in a playroom containing both aggressive toys (including the Bobo doll) and non-aggressive ones, while their behaviour was observed and recorded through a one-way mirror.
Data Collection and Behavioural Measures
Behaviours were coded into three categories: (1) imitative (direct copies of the model’s aggressive actions and phrases), (2) partially imitative, and (3) non-imitative aggression (novel acts). Checks for inter-rater reliability ensured that the observations were consistent, which is essential for scientific rigor.Results and Findings
The results painted a clear picture: children who watched the aggressive models, especially when the model was the same sex, displayed significantly more imitative aggression than those who saw non-aggressive models or no model at all. Boys were markedly more aggressive than girls, notably imitating male models’ behaviour. The presence of a non-aggressive model actually appeared to dampen aggressive responses, highlighting the suppressive power of gentle role-modelling.These findings directly supported Bandura's Social Learning Theory, offering compelling proof that young children could internalise and reproduce complex behaviours like aggression simply by watching others.
Critical Evaluation
The study’s genius lay in its methodological rigour: by employing precise coding, a matched pairs design, and a clear operational definition of aggression, Bandura et al made it convincingly clear that observation alone could drive aggressive behaviour. The inventive use of the Bobo doll offered consistency and avoided ethical dilemmas around exposing children to genuine violence.However, the artificial nature of the setting casts doubt on ecological validity. In real UK classrooms or at the park, instances of aggression are embedded in a rich tapestry of social cues and consequences, quite unlike the laboratory. The ethics, by modern British Psychological Society guidelines, are problematic: there was potential for lasting distress, and informed consent from children was not obtainable, though parents did consent. Moreover, cultural specificity is a concern—the children were American—but the core mechanism of observational learning has been found repeatedly in UK settings, such as Bandura-inspired playground studies in London and Liverpool.
Potential demand characteristics cannot be discounted: children may have believed that hitting the Bobo doll was simply what was expected of them, having seen the adult do it. Future research could benefit from using naturalistic observations (such as video analysis of play in nursery schools) and longitudinal follow-up to assess the durability of any learnt aggression.
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