@rnickcochan wrote:
N = 319 participants
Agency - continuous, between subjects
Etype - categorical, within subjects (2 levels, volitional or situational)
Edegree - continuous, within subjects
PPCDir (change) - DV
Etype and edegree are related. Participants rated (edgree on 1-5 likert scale) how much they agreed that volitional strategies (etype = v) AND situational strategies (etype = S) helped them change.
Agency is also 1-5 likert scale
PPCDIR is a difference score between past and current rated personality. PPabs which you will see on the data is another DV I want to run the model with (absolute change).
Attached is my data in case that helps you!
Honestly, I never download (and many people never download) Microsoft Office files as they can be security risks. Nor do I see any reason to run your model on your data and get the same results that you have. However, I do have suggestions for you to try.
I suspect that having 319 different subjects, and you are looking for a three way interaction, makes the data very sparse, and you may be having problems because of that. I realize that your goal is to determine the significance of the 3-way interaction; nevertheless some things cannot be estimated from certain types of data, and as an experiment I recommend you try fitting the model without the three way interaction to see if the solution converges.
I am also confused by "continuous within subjects" for edegree, as I am not sure I have ever seen a continuous variable "within subjects", but my experience in this area is limited and maybe it does exist. Continuous, across subjects, makes more sense to me. I also don't see in your code how you have specified this "continuous within subjects" in the model.
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