Cambridge Psychology AS Level Unit 1 Notes Vocab

Cambridge AS Level Psychology Unit 1 focuses on research methods, teaching how psychologists design, conduct, and analyze studies scientifically. It covers different types of experiments—laboratory, field, natural, and quasi—and how each balances control and realism. Students learn about variables (independent, dependent, extraneous, and confounding) and the importance of operationalizing them clearly. The unit explains experimental designs like independent, repeated, and matched measures, as well as sampling methods such as random, opportunity, volunteer, systematic, and stratified. It explores various data collection techniques including observations, self-reports, case studies, and correlations, alongside distinctions between quantitative and qualitative data.