Bina conducted an investigation into whether a mobile mindfulness app reduced daily anxiety levels in university students during exam season. Bina used a volunteer sampling technique (by placing promotional posters around the university library) to recruit her participants for her study.
Half the participants completed 10 minutes of guided mindfulness daily using the app (Condition A), while the other half spent 10 minutes daily doing quiet reading (Condition B). After two weeks, all participants recorded their self-reported anxiety levels using a standardized questionnaire.
Explain one strength and one weakness of the sampling technique used by Bina in her investigation on the use of the mindfulness app.
Practise Edexcel A Level Psychology Methods with exam-style questions for A Level Psychology. 638 questions, 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.