A practical guide for the analysis of longitudinal behavioural data. It addresses a variety of substantive research questions with longitudinal data, including how student achievement changes over time, how psychopathology develops, and how intra-group conflict evolves.

This book is unique in its focus on showing students in the behavioral sciences how to analyze longitudinal data using R software. The book focuses on application, making it practical and accessible to students in psychology, education, and related fields, who have a basic foundation in statistics. It provides explicit instructions in R computer programming throughout the book, showing students exactly how a specific analysis is carried out and how output is interpreted.