Researchers from the University of Amsterdam conducted an experiment with 750 US participants to examine how social context influences individual decisions regarding rule compliance. Participants were assigned a task involving selecting illuminated squares on a computer screen, with financial incentives rewarded for choosing squares progressively further to the right of the correct answer, thereby encouraging rule violations.
The study revealed that approximately 23% of initial choices involved the highest-reward squares, indicating substantial baseline rule-breaking. Critically, participant behavior shifted significantly based on observing others’ choices. When participants witnessed minor rule violations by others, their own rule-breaking increased slightly. However, exposure to flagrant rule violations produced a pronounced escalation effect, with some participants exceeding the violations they had observed.
The researchers noted that influence was particularly strong when observed individuals shared the participant’s political affiliation. Computer simulations based on the experimental findings suggested that escalating rule violations by a minority could trigger systemic breakdown of compliance across an entire group. Notably, approximately one-third of participants maintained consistent rule adherence despite financial penalties for doing so.
Prof Stephen Reicher of the University of St Andrews, commenting on the work, identified limitations including the abstract nature of the experimental task and absence of real-world consequences for rule-breaking. Reicher also emphasized that the findings challenge straightforward contagion theory, proposing instead that susceptibility to others’ behavior depends on the nature of those individuals. He cautioned against interpreting the results as suggesting inevitable behavioral cascades, noting that many individuals respond to norm violations by reinforcing rather than abandoning rules.
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