Researchers are conducting an experiment to investigate the effectiveness of a new binaural-beat audio track designed to improve cognitive processing speed and focus. One group of participants listens to the active binaural-beat track through headphones, while a control group listens to a standard white-noise track of identical volume and duration. Both groups then complete a computerised rapid reaction-time task.
The researchers are concerned that the outcome of this study might be biased by demand characteristics and investigator effects.
Explain how the researchers could design and conduct this study to eliminate or reduce both demand characteristics and investigator effects.
689 exam-style questions on AQA A Level Psychology Scientific processes. Each one has a worked solution and a mark scheme showing where the marks go.