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    Tag: multilevel

    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

    Recent Posts

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    • CenterStat Partners with APA to Offer Free Training on Intensive Longitudinal Data August 28, 2022
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    • My advisor told me to use principal components analysis to examine the structure of my items and compute scale scores, but I was taught not to use it because it is not a “true” factor analysis. Help! October 12, 2021
    • Second Annual Winter Institute September 21, 2021

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