A researcher wanted to investigate the relationship between daily screen time and subjective sleep quality in the general UK adult population. To recruit participants, they posted an advertisement on a social media app primarily popular with teenagers and young adults, selecting the first 60 individuals who responded.
Outline one way in which this sample was biased.
644 exam-style questions on OCR A Level Psychology Research methods and techniques. Each one has a worked solution and a mark scheme showing where the marks go.