From Piliavin et al.'s subway Samaritan study on bystander behaviour:
Outline two quantitative findings that demonstrate differences in passenger behaviour when the victim was in the 'ill' condition compared to the 'drunk' condition.
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.