## What are modification indices and should I use them when fitting SEMs to my own data?

## Do you have any materials that demonstrate how to estimate structural equation models using lavaan in R?

## How do you choose the best longitudinal data analytic method for testing your research questions?

## What is the difference between a growth model estimated as a multilevel model versus as a structural equation model?

## How can I define nonlinear trajectories in a growth curve model?

## Can I estimate an SEM if the sample data are not normally distributed?

## How do I know if my structural equation model fits the data well?

## Best Methods for Handling Missing Data in Intensive Longitudinal Designs

## CBA Office Hours on Linear Regression

## Growth Models with Time-Varying Covariates

CenterStat's Help Desk is a blog in which Dan and Patrick respond to commonly asked questions about a variety of topics behavioral, educational, and health research including experimental design, measurement, data analysis, and interpretation of findings. The responses are intentionally brief and concise, and additional resources are provided such as recommended readings, provision of exemplar data and computer code, or links to other potential learning materials. Readers are welcome to submit their own questions for future Help Desk responses at [email protected].

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