In a study into the effectiveness of a new herbal patch for reducing physiological stress, researchers provided one group of participants with the active herbal patch and another group with an identical-looking placebo patch.
The researchers were concerned that the outcome of the study might be influenced by the problems of demand characteristics and investigator effects.
Explain what the researchers could do to eliminate or reduce demand characteristics and investigator effects in this study.
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.
