A neuroscientist conducted a controlled laboratory experiment to investigate the effect of caffeine consumption (200 mg caffeine pill vs. an identical placebo pill) on the reaction time of participants in a computerized hazard-perception task.
Outline what is meant by 'cause and effect' and explain how it applies to this experiment into cognitive performance.
47 exam-style questions on OCR A Level Psychology How science works. Each one has a worked solution and a mark scheme showing where the marks go.