Nonlinear growth curves or growth curves that follow a specified nonlinear function in time enable researchers to model complex developmental patterns with parameters that are easily interpretable. In this article we describe how a variety of sigmoid curves can be fit using the M"plus" structural modeling program and the nonlinear…

Presents a new approach that extends conventional random coefficient growth models to incorporate a categorical latent trajectory variable representing latent classes or mixtures. Provides a didactic example of this new methodology using adolescent alcohol use data and discusses the method as a tool for mapping hypotheses of development onto…

Reviewed construct of resilience and adaptation by measuring psychosocial functioning, self-esteem, academic performance, absence or low level of drug use, gang involvement, and delinquent activities among 877 at-risk youths. Found adjustment and low level of antisocial behavior as two latent constructs of resilience and adaptation. (Author/DLH)