I'm a PhD student currently working on an independent research project using latent growth curve modeling. This is my first time using this statistic, and I was wondering if anyone had a good reference that discusses how to form the statistical (i.e., mathematical) equations. I like to grasp what I'm doing before "plugging and chugging' so to speak.

Specifically, I'm investigating factors that influence change in polydrug use over three waves of data in a sample of urban Hispanic/Latino youth.

Also, if anyone knows of a reference for equation writing with parallel process models, my overly ambitious colleague would be appreciative.

Thank you for your assistance!