2. Outline of Presentation. What are growth models?Nuts and BoltsHands-On ExampleAdditional Issues. 3. Part I: What is a Growth Model?. 4. What is a Growth Model?. A way to assess individual stability and change, both growth and decay, over time.A two-level, hierarchical model that that models (1) within individual change over time and (2) between individual differences in patterns of growth..