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.
Practise AQA A Level Psychology Scientific processes with exam-style questions for A Level Psychology. 689 questions, matched to the AQA A Level Psychology (7182) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.
