Reflect on your understanding by working through these review questions.

1. When is a case study the best research design and what are its disadvantages?
2. What is the best design for establishing a causal relationship and why?
3. What is the best design for establishing how commonly something occurs in a population and why?
4. How can you avoid threats to the validity of conclusions drawn from experimental research?
5. What are the characteristics, advantages and disadvantages of longitudinal studies?
6. What designs are available for evaluating the effectiveness of interventions designed to improve people’s lives?
7. Does choice of research design determine whether qualitative or quantitative data should be collected?