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A mediator is a variable that plays an intermediate role in a causal chain, i.e., the 1st variable in the chain causes the mediator, which in turn causes the 3rd variable. Partial mediation is when the 1st variable causes the 3rd both through the mediator & directly.

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How should I specify a multi-level moderated mediation in lavaan?

I have a repeated measures crossover design where two treatments were delivered to all participants, and measurements of the mediator M and outcome Y were taken following each treatment. I also have a …
Ben Smith's user avatar