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.
638 exam-style questions on Edexcel A Level Psychology Methods. Each one has a worked solution and a mark scheme showing where the marks go.