Marcus carried out an experiment to investigate the effectiveness of a new mindfulness mobile application designed to reduce nicotine cravings in e-cigarette users.
He selected e-cigarette users from students who happened to be present in the university library lobby on a Tuesday afternoon.
He compared two groups of participants:
Marcus then asked all participants to rate the overall intensity of their nicotine cravings over a 24-hour period. A score of 10 represented 'extremely high craving intensity' and a score of 0 represented 'no cravings at all'.
Explain one strength and one limitation of the sampling technique used by Marcus in this study.
Practise Edexcel A Level Psychology Research methods and skills with exam-style questions for A Level Psychology. 657 questions covering Research methods and skills, matched to the Edexcel A Level Psychology (9PS0) 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.
