ABSTRACT
In this chapter I provide a brief, non-technical overview of my decade-long research programme aimed at developing a group-based method for analysing developmental trajectories. A developmental trajectory describes the course of a behaviour over age or time. This work is more fully described, including technical details, in Nagin (1999) and Nagin and Tremblay (2001a). A comprehensive treatment is forthcoming in a book to be published by Harvard University Press. An SAS-based procedure with the capability for supporting all the analysis described in this overview is also available free of charge from the website https://www.NCOVR.org" xmlns:xlink="https://www.w3.org/1999/xlink">www.NCOVR.org. Documentation is also available at this site. For an overview of the software, see Jones et al. (2001).
