In Piliavin et al.'s study, real passengers saw an unexpected collapse during an ordinary subway journey.
Which of the following is a strength of the study shown by this information?
The unexpected event in an ordinary journey gave the behaviour high ecological validity.
Every passenger gave informed consent before the victim collapsed.
Random allocation made the passengers representative of the population.
The laboratory setting allowed complete control of extraneous variables.
36 exam-style questions on Edexcel GCSE Psychology 5.2 Studies, covering 5.2.1 Piliavin et al (1969) and 5.2.2 Haney, Banks, and Zimbardo (1973). Each one has a worked solution and a mark scheme showing where the marks go.