At a railway station, a psychologist programmes an electronic display beside a staircase and an escalator. During alternating 15-minute periods, the display shows either the message ‘Take the stairs for an active journey’ or a neutral station message. Automatic counters record how many passengers use the stairs and how many use the escalator. Evaluate the decision to investigate stair use with a field experiment at the station.
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.