Latent Curve Models

An effective technique for data analysis in the social sciences The recent explosion in longitudinal data in the social sciences highlights the need for this timely publication. Latent Curve Models: A Structural Equation Perspective provides an effective technique to analyze latent curve models (LCMs). This type of data features random intercepts and slopes that permit each case in a sample to have a different trajectory over time. Furthermore, researchers can include variables to predict the parameters governing these trajectories. The authors synthesize a vast amount of research and findings and, at the same time, provide original results. The book analyzes LCMs from the perspective of structural equation models (SEMs) with latent variables. While the authors discuss simple regression-based procedures that are useful in the early stages of LCMs, most of the presentation uses SEMs as a driving tool. This cutting-edge work includes some of the authors' recent work on the autoregressive latent trajectory model, suggests new models for method factors in multiple indicators, discusses repeated latent variable models, and establishes the identification of a variety of LCMs. This text has been thoroughly class-tested and makes extensive use of pedagogical tools to aid readers in mastering and applying LCMs quickly and easily to their own data sets. Key features include: Chapter introductions and summaries that provide a quick overview of highlights Empirical examples provided throughout that allow readers to test their newly found knowledge and discover practical applications Conclusions at the end of each chapter that stress the essential points that readers need to understand for advancement to more sophisticated topics Extensive footnoting that points the way to the primary literature for more information on particular topics With its emphasis on modeling and the use of numerous examples, this is an excellent book for graduate courses in latent trajectory models as well as a supplemental text for courses in structural modeling. This book is an excellent aid and reference for researchers in quantitative social and behavioral sciences who need to analyze longitudinal data.

An effective technique for data analysis in the social sciencesThe recent explosion in longitudinal data in the social scienceshighlights the need for this timely publication. Latent CurveModels: A Structural Equation Perspective provides an effectivetechnique to analyze latent curve models (LCMs). This type of datafeatures random intercepts and slopes that permit each case in asample to have a different trajectory over time. Furthermoreresearchers can include variables to predict the parametersgoverning these trajectories.The authors synthesize a vast amount of research and findingsand, at the same time, provide original results. The book analyzesLCMs from the perspective of structural equation models (SEMs) withlatent variables. While the authors discuss simple regression-basedprocedures that are useful in the early stages of LCMs, most of thepresentation uses SEMs as a driving tool. This cutting-edge workincludes some of the authors' recent work on the autoregressivelatent trajectory model, suggests new models for method factors inmultiple indicators, discusses repeated latent variable models, andestablishes the identification of a variety of LCMs.This text has been thoroughly class-tested and makes extensiveuse of pedagogical tools to aid readers in mastering and applyingLCMs quickly and easily to their own data sets. Key featuresinclude:* Chapter introductions and summaries that provide a quickoverview of highlights* Empirical examples provided throughout that allow readers totest their newly found knowledge and discover practicalapplications* Conclusions at the end of each chapter that stress theessential points that readers need to understand for advancement tomore sophisticated topics* Extensive footnoting that points the way to the primaryliterature for more information on particular topicsWith its emphasis on modeling and the use of numerous examplesthis is an excellent book for graduate courses in latent trajectorymodels as well as a supplemental text for courses in structuralmodeling. This book is an excellent aid and reference forresearchers in quantitative social and behavioral sciences who needto analyze longitudinal data.

Preface.1 Introduction.1.1 Conceptualization and Analysis of Trajectories.1.2 Three Initial Questions About Trajectories.1.3 Brief History of Latent Curve Models.1.4 Organization of the Remainder of the Book.2 Unconditional Latent Curve Model.2.1 Repeated Measures.2.2 General Model and Assumptions.2.3 Identification.2.4 Case-By-Case Approach.2.5 Structural Equation Model Approach.2.6 Alternative Approaches to the SEM.2.7 Conclusions.Appendix 2A: Test Statistics, Nonnormality, and StatisticalPower.3 Missing Data and Alternative Metrics of Time.3.1 Missing Data.3.2 Missing Data and Alternative Metrics of Time.3.3 Conclusions.4 Nonlinear Trajectories and the Coding of Time.4.1 Modeling Nonlinear Functions of Time.4.2 Nonlinear Curve Fitting: Estimated Factor Loadings.4.3 Piecewise Linear Trajectory Models.4.4 Alternative Parametric Functions.4.5 Linear Transformations of the Metric of Time.4.6 Conclusions.Appendix 4A: Identification of Quadratic and Piecewise LatentCurve Models.4A.1 Quadratic LCM.4A.2 Piecewise LCM.5 Conditional Latent Curve Models.5.1 Conditional Model and Assumptions.5.2 Identification.5.3 Structural Equation Modeling Approach.5.4 Interpretation of Conditional Model Estimates.5.5 Empirical Example.5.6 Conclusions.6 The Analysis of Groups.6.1 Dummy Variable Approach.6.2 Multiple-Group Analysis.6.3 Unknown Group Membership.6.4 Conclusions.Appendix 6A: Case-by-Case Approach to Analysis of VariousGroups.6A.1 Dummy Variable Method.6A.2 Multiple-Group Analysis.6A.3 Unknown Group Membership.6A.4 Appendix Summary.7 Multivariate Latent Curve Models.7.1 Time-Invariant Covariates.7.2 Time-Varying Covariates.7.3 Simultaneous Inclusion of Time-Invariant and Time-VaryingCovariates.7.4 Multivariate Latent Curve Models.7.5 Autoregressive Latent Trajectory Model.7.6 General Equation for All Models.7.7 Implied Moment Matrices.7.8 Conclusions.8 Extensions of Latent Curve Models.8.1 Dichotomous and Ordinal Repeated Measures.8.2 Repeated Latent Variables with Multiple Indicators.8.3 Latent Covariates.8.4 Conclusions.References.Author Index.Subject Index.