Elena is investigating the effectiveness of a new mobile app designed to help young adults quit vaping. She recruited her participants from her local university campus using a volunteer sampling technique.
Elena gave two different groups of participants a different version of the app. In Condition A, she gave the participants a version including progress trackers with social comparison leaderboards. In Condition B, the app was changed to provide standard health fact alerts only.
Explain one weakness of Elena using a volunteer sampling technique for her investigation.
57 exam-style questions on Edexcel A Level Psychology Research methods and skills, covering Research methods and skills. Each one has a worked solution and a mark scheme showing where the marks go.