A research methods text with a unique focus on evidence-based practice with couples and families, this book bridges the divide between research and clinical work. The text offers comprehensive, user-friendly coverage of measurement and design issues and basic qualitative and quantitative methods. Illustrating research concepts with clinically relevant examples and sample studies, it teaches clear steps for evaluating different types of studies and identifying common threats to validity. Of special value to therapists, it provides a systematic framework for using research to guide the selection and evaluation of interventions that meet the needs of particular clients.