11 papers
Examination of Nonlinear Longitudinal Processes with Latent Variables, Latent Processes, Latent Changes, and Latent Classes in the Structural Equation Modeling Framework: The R package nlpsem
Jin Liu
We introduce the R package nlpsem, a comprehensive toolkit for analyzing longitudinal processes within the structural equation modeling (SEM) framework, incorporating individual me…
Decomposing Impact on Longitudinal Outcome of Time-varying Covariate into Baseline Effect and Temporal Effect
Jin Liu
Longitudinal processes are often associated with each other over time; therefore, it is important to investigate the associations among developmental processes and understand their…
Estimating Rate of Change for Nonlinear Trajectories in the Framework of Individual Measurement Occasions: A New Perspective on Growth Curves
Jin Liu, Robert A. Perera
Researchers are often interested in examining between-individual differences in within-individual processes. If the process under investigation is tracked for a long time, its traj…
Assessing Mediational Processes Using Piecewise Linear Growth Curve Models with Individual Measurement Occasions
Jin Liu, Robert A. Perera
Longitudinal processes often unfold concurrently where the growth of two or more longitudinal outcomes are associated. Additionally, if the study under investigation is long, the g…
Extending Latent Basis Growth Model to Explore Joint Development in the Framework of Individual Measurement Occasions
Jin Liu
Longitudinal processes often pose nonlinear change patterns. Latent basis growth models (LBGMs) provide a versatile solution without requiring specific functional forms. Building o…
Jenss-Bayley Latent Change Score Model with Individual Ratio of Growth Acceleration in the Framework of Individual Measurement Occasions
Jin Liu
Longitudinal data analysis has been widely employed to examine between-individual differences in within-individual changes. One challenge of such analyses is that the rate-of-chang…