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Cognitive dissonance is the uncomfortable mental state that arises when beliefs, attitudes or actions conflict. Leon Festinger's theory says people are motivated to reduce it.
Starter thread · AI-reviewed against its sources
The bystander effect is the finding that people are less likely to help when others are present. The famous Genovese story of 38 passive witnesses is not supported by the evidence.
Starter thread · AI-reviewed against its sources
Dunbar's number is the claim that humans have a natural social group size of about 150. Its originator defends it, while a 2021 reanalysis found the statistical basis too uncertain.
Starter thread · AI-reviewed against its sources
