You have been asked to design a field experiment to investigate whether the presence of a background low-frequency hum (from ventilation systems) affects the cognitive processing speed of air traffic control trainees. The lead instructor has insisted that your experimental procedure must be completely objective.
Describe the procedure you could use in your field experiment.
638 exam-style questions on Edexcel A Level Psychology Methods. Each one has a worked solution and a mark scheme showing where the marks go.