multilevel Archives - CenterStat

CenterStat Partners with APA to Offer Free Training on Intensive Longitudinal Data

With the evolution and ever greater penetration of smartphones, other personal electronic devices, and wearable technologies, scientists are increasingly able to collect and analyze Intensive…

Patrick Curran and Dan Bauer August 28, 2022

I fit a multilevel model and got the warning message “G Matrix is Non-Positive Definite.” What does this mean and what should I do about it?

Received the cryptic warning message "G matrix is non-positive definite"? Learn what this means and what to do about it.

Patrick Curran and Dan Bauer July 22, 2021

I’m reporting within- and between-group effects in from a multilevel model, and my reviewer says I need to address “sampling error” in the group means. What does this mean, and what can I do to address this?

Why between-group effects estimating in MLMs are sometimes biased, and what to do about it

Patrick Curran and Dan Bauer March 30, 2021