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QLDPsychologySyllabus dot point

Why do individuals change their behaviour to match a group or comply with authority?

Explain conformity and obedience as forms of social influence, and describe the situational and individual factors that affect them using classic studies

A focused answer to the QCE Psychology Unit 4 dot point on social influence. Distinguishes conformity from obedience, explains normative and informational influence, and works through Asch's line study, Milgram's obedience experiments and Zimbardo's Stanford prison study, including the situational factors that increase or decrease each.

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What this dot point is asking

QCAA wants you to explain two key forms of social influence, conformity and obedience, and to describe what makes people more or less likely to yield to them. You must distinguish the two concepts, explain why they happen, and support your answer with named classic studies and the situational variables they revealed.

The answer

Conformity versus obedience

Conformity is a change in behaviour or belief to match those of a group, usually in response to implied or imagined group pressure rather than a direct order. Obedience is complying with a direct instruction from an authority figure. The key differences are that obedience involves an explicit order and a status difference, whereas conformity involves implicit pressure from peers of equal status.

Why people conform

Deutsch and Gerard (1955) identified two reasons.

  • Normative social influence. Conforming to gain acceptance and avoid rejection. This typically produces compliance (public agreement without private belief).
  • Informational social influence. Conforming because we believe the group has accurate information, especially in ambiguous situations. This typically produces internalisation (genuine private acceptance).

Asch (1951), the line study

Participants judged which of three comparison lines matched a standard line, an easy task, while seated among confederates who gave obviously wrong answers on certain trials. About 75 percent of participants conformed to the wrong answer at least once, and the overall conformity rate was around 37 percent. Asch then varied the situation and found:

  • Group size. Conformity rose as the majority grew to about three or four, then levelled off.
  • Unanimity. A single dissenting confederate sharply reduced conformity.
  • Task difficulty. Harder, more ambiguous tasks increased conformity (informational influence).

Milgram (1963), obedience to authority

Participants were ordered by an experimenter to deliver what they believed were increasingly severe electric shocks to a learner (a confederate) for wrong answers. Despite the learner's apparent distress, 65 percent of participants continued to the maximum 450 volts. Milgram's variations showed obedience depended on situational factors:

  • Proximity. Obedience dropped when the learner was in the same room or when the experimenter gave orders by telephone.
  • Location. Moving from prestigious Yale to a run-down office reduced obedience.
  • Legitimacy and presence of authority. Obedience fell when the experimenter was replaced by an ordinary person.

Milgram explained obedience through the agentic state, in which people see themselves as agents carrying out another's wishes and feel reduced personal responsibility.

Zimbardo (1971), the Stanford prison study

Student volunteers were randomly assigned as guards or prisoners in a mock prison. The guards quickly became abusive and the prisoners passive and distressed, and the study was stopped early. Zimbardo argued that the situation and assigned social roles, more than personality, drove the behaviour. The study is also a major ethics case study because of the harm to participants.

Putting it together for an exam

Define the form of influence, explain why it occurs (normative versus informational for conformity; the agentic state for obedience), then cite the named study and the situational variable that changes the outcome. Linking the concept to a specific manipulation is what earns marks.

Exam-style practice questions

Practice questions written in the style of QCAA exam questions on this dot point, with worked answer explainers. The year tag is the paper they imitate, not the source.

2021 QCAA2 marksThis question refers to the experiment conducted by Asch (1951). Describe the type of group social influence displayed. Provide an example from the experiment to support your response.
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Type of influence (1 mark): normative social influence, conforming to match the majority in order to gain approval and avoid standing out or being rejected, producing public compliance rather than genuine private belief.

Example from the experiment (1 mark): on the critical trials, participants gave the same obviously incorrect line judgement as the unanimous confederates (overall about a third of responses conformed), even though the correct answer was clear, because they did not want to be the odd one out in front of the group.

2021 QCAA2 marksResearchers replicated Asch's methodology. However, half the participants were instructed to state their responses publicly and the other half privately. Predict the behaviour of participants in the public group. Give a reason for your response.
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Prediction (1 mark): participants in the public group will conform to the majority's incorrect answer more often than those responding privately.

Reason (1 mark): stating answers publicly exposes participants to normative social influence, the pressure to be accepted and avoid the discomfort of openly disagreeing with the group, so they conform to fit in. Private responding removes that social pressure and the audience, so participants are freer to give their own correct judgement and conformity falls.

2021 QCAA1 marksThis question refers to the experiment conducted by Asch (1951). Identify the significance of Asch's experiment for social psychological research.
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1 mark for identifying its significance: Asch's experiment provided clear experimental evidence that people will conform to a unanimous majority even when it is plainly wrong, demonstrating the power of group pressure (normative social influence) over individual judgement and establishing conformity as a measurable phenomenon for laboratory study.