Dr Aris conducted a study investigating the impact of a gamified language-learning app on cognitive focus in a small sample of 12 retired adults. He recruited participants using opportunity sampling from a local bridge club, and measured cognitive focus using a self-report rating scale.
Explain one improvement Dr Aris could make to his study.
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.