A health psychologist is investigating the social influences on vaping addiction among teenagers. She conducts focus groups with high school students who vape daily, asking them about peer group dynamics and social media influences, and records their detailed responses. She also obtains and analyzes school medical room logs and regional youth health survey statistics on vaping trends compiled by the local health authority.
Referring to this investigation, explain the difference between primary and secondary data.
235 exam-style questions on AQA A Level Psychology Data handling and analysis. Each one has a worked solution and a mark scheme showing where the marks go.