Written for researchers who need to review the unique challenges of studying ethnic minority and economically disadvantaged populations, this book covers the sampling, recruitment, ethical dilemmas and retention in longitudinal studies. Knight (psychology, Arizona State U.), Roosa (social and family dynamics, Arizona State U.) and Umana-Taylor (family and human development, Arizona State U.) describe the measurement equivalence issues, translation processes and other issues that can influence the accuracy of these studies and provide a list of best practices to ensure validity. The authors also include many examples and case studies from their own work in the field to illustrate the use of these methods. Annotation ©2009 Book News, Inc., Portland, OR (booknews.com)