Bobo Doll Experiment Notes

Bobo Doll Experiment: Overview

• Albert Bandura's study demonstrating that children can learn aggressive behavior through observation.
• Children imitated adults hitting a Bobo doll, proving observational learning.

Key Takeaways

• Aim: Investigate if children learn aggressive behaviors by observing adults and the impact of gender on imitation.
• Method: Children observed aggressive, calm, or no adult models and were then observed for imitative aggression.
• Results: Children exposed to aggressive models were more aggressive, with boys imitating male adults most.
• Conclusion: Children learn aggressive behavior by watching others, highlighting the importance of role models.

Background

• Concerns in the 1960s regarding violence in society and its impact on children.
• Researchers explored whether watching aggression could teach children to act aggressively.
• Behaviorists (Skinner): Believed learning occurs through rewards and punishments.
• Psychoanalysts (Freud): Suggested watching aggression provides a safe outlet (catharsis).
• Bandura challenged these theories by exploring if children copy aggression by observing adults, without direct reward or punishment.

Experiment Setup

• Bandura & Walters (1959) found aggressive parents often have aggressive children, suggesting imitation and modeling.
• Bobo doll experiment tested if observing aggression influenced children's actions.
• Aimed to resolve the debate on whether aggression is learned through personal experiences or observation.
• Conducted a series of experiments on observational learning.

Aim of 1961 Experiment

• To investigate if social behaviors (aggression) can be acquired by observation and imitation.
• Examined if children were more likely to imitate same-sex models.
• Explored if boys would display more aggression than girls when exposed to aggressive modeling.

Sample

• 72 children (36 boys and 36 girls), ages 3-6 years old at Stanford University Nursery School.
• Children were pre-tested for aggression levels in the nursery using four 5-point rating scales.
• Matched pairs design was used to ensure similar aggression levels in each group.
• High inter-rater reliability (r = 0.89) was established for observers.

Method and Design

• Laboratory experiment with an independent groups design.
• Independent Variable (IV): Type of model behavior (aggressive, non-aggressive, or none) and model’s gender.
  • 24 children shown aggressive model.
  • 24 children shown non-aggressive model.
  • 24 children in the control condition (no model).
• Dependent Variable (DV): Amount of aggressive behavior shown by the child in a test situation, measured observationally.

Stages of the Experiment

• Stage 1: Modeling
  • Children were individually shown into a room containing toys.
  • 1. Aggressive Model Condition:
    • Observed an adult model behave aggressively toward a Bobo doll.
    • Model punched, hit with a mallet, tossed, and kicked the doll, using phrases like “Sock him in the nose,” “Hit him down,” “Kick him,” and “Pow!”.
    • Session lasted 10 minutes.
  • 2. Non-Aggressive Model Condition:
    • Observed an adult model who sat quietly and assembled tinker toys, ignoring the Bobo doll, for 10 minutes.
  • 3. Control Condition:
    • No adult model was present; provided a baseline for typical behavior.
• Stage 2: Aggression Arousal
  • Children were subjected to mild frustration to provoke arousal.
  • Taken to a room with attractive toys, then told the toys were reserved for other children.
  • Designed to ensure even calm children felt frustrated.
• Stage 3: Test for Delayed Imitation
  • Children were taken to a third room with aggressive (Bobo doll, mallet, toy gun) and non-aggressive toys (dolls, tea sets, crayons, farm animals) and left to play freely for 20 minutes.

Observations and Results

• Researchers observed the child's behavior through a one-way mirror, recording at 5-second intervals (240 response units per child).
• Imitative Aggression:
  • Children who watched an aggressive adult were more likely to imitate aggressive behavior.
  • Children who saw a calm adult or no adult showed almost no aggressive imitation.
  • About 70% in non-aggressive or control groups showed no imitative aggression.
• General Aggression Levels:
  • Exposure to aggressive models increased overall aggression, including new acts not shown by the model.
  • Children who saw aggressive adults were less inhibited and showed more creative aggression.
    -$Example:$ Girls who watched the aggressive adult averaged 18 aggressive acts, compared to 0.5 for those who saw a calm adult.
• Gender Differences:
  • Boys were more likely to imitate physical aggression, especially from a male model.
  • Girls showed more physical aggression when watching a male model but were more verbally aggressive after watching a female model.
  • Both boys and girls were more strongly influenced by male models.
• Qualitative Observations:
  • Children copied the language used by aggressive adults.
  • Children criticized aggression by a female adult as inappropriate; praised aggression by a male adult as strong.

Conclusion

• Children learn social behavior (aggression) through observational learning.
• Challenges behaviorist view that behavior must be reinforced to be learned.
• Refutes the catharsis hypothesis; watching violence increases aggressive behavior.
• Highlights the influence of role models in shaping behavior.
• Laid the groundwork for Bandura’s Social Learning Theory.

Strengths

• Experimental Control: Standardized procedure, matched children on aggression levels.
  • Differences in aggression were due to observed behavior.
  • Cause-and-effect relationship.
• Reliability and Replicability: Structured design, high inter-observer reliability.
  • Replicated in 1963 and 1965 with consistent results.
• Rich Data (Quantitative and Qualitative): Counts of aggressive acts and children’s remarks.
  • Comprehensive picture of phenomena.
• Novelty and Theoretical Impact: Challenged the need for direct reinforcement for learning.
  • Foundation for Social Learning Theory.
• Usefulness of Research (Practical Applications): Highlights the role of role models.
  • Used in education, therapy, and to shape public understanding of media violence.

Limitations

• Artificial Setting (Ecological Validity): Lab environment may not represent real-world social contexts.
  • Children do not often see adults attacking dolls.
  • May have encouraged demand characteristics.
• Limited Sample Diversity: Participants were young children from one nursery school at Stanford University.
  • Findings might not reflect children from different cultures, socio-economic backgrounds, or age groups.
• Short-Term and Narrow Measure of Aggression: Measured only short-term aggressive behaviors directed at a doll.
  • Unclear if the observed behavior was a transient effect.
  • Construct validity of the aggression measure can be questioned.
• Potential Observer Bias: Observers knew the studies aims and which condition the child had been in.
  • Could have exaggerated differences between groups.
• Influence of Novelty (Familiarity with the Bobo Doll): Children who had never played with a Bobo doll before were five times more likely to imitate aggression.

Ethical Issues

• Conducted in 1961, predating modern ethics codes.
• Protection from harm: Children exposed to violent behavior; potential lasting negative effect.
• Informed consent and assent: Preschool children could not give informed consent.
• Right to withdraw: Not clear children knew they could withdraw from the study.
• Bandura argued benefits outweighed risks; modern researchers mitigate these issues.

Vicarious Reinforcement

• Observer behavior is affected by the consequences of a model’s behavior.
• More likely to imitate behavior that is rewarded and refrain from behavior that is punished.
• Bandura (1965) tested vicarious reinforcement with a similar setup.
• One group saw the model's aggression rewarded, another punished, and a control group saw no consequences.
• Children in the reward and control conditions imitated more aggressive actions.
• Children in the punishment group learned the aggression but did not imitate it due to expected negative consequences.
• Reinforcement gained by watching another person is known as vicarious reinforcement.