An environmental psychologist is concerned that demand characteristics compromised the internal validity of their laboratory experiment investigating how the presence of green houseplants in an office affects employee productivity.
Suggest one possible modification to the design of this study and explain how this might improve its validity.
Practise AQA A Level Psychology Scientific processes with exam-style questions for A Level Psychology. 100 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.