Describe what Piliavin et al. (1969) discovered regarding the relationship between the number of bystanders and the speed of helping in their subway Samaritan study.
105 exam-style questions on OCR A Level Psychology Responses to people in need, covering Piliavin et al. (1969): Subway Samaritan and Levine et al. (2001): Cross-cultural altruism. Each one has a worked solution and a mark scheme showing where the marks go.