A psychologist investigates which path visitors choose at a public park during normal opening hours. For one week, signs directing visitors to the lake path are displayed at a junction. The following week, the signs are removed. The number of visitors choosing the lake path is recorded.
Explain one strength of using a field experiment for this investigation.
Explain one weakness of using a field experiment for this investigation.
139 exam-style questions on OCR GCSE Psychology 7.2 Doing Research, covering 7.2.1 Experiments, 7.2.2 Interviews, 7.2.3 Questionnaires (Surveys), 7.2.4 Observations, 7.2.5 Case Studies, and 7.2.6 Correlations. Each one has a worked solution and a mark scheme showing where the marks go.