This is the first methods handbook specifically designed to meet the needs of today's developmental scholars. Leading developmental methodologists describe cutting-edge approaches to measurement and design, data collection, and interindividual and intraindividual longitudinal analysis. For each method or analytic tool -- whether created to measure change or adapted for this purpose -- chapters describe key issues, assumptions, and applications. Chapters also include research examples that demonstrate the procedures in action and give readers a better understanding of how to match research questions to developmental methods. The companion website provides data and program syntax files for most of the examples.