qunestion about 3dLMEr: Model test failed

If I have two within-subject factros (eg. condition, method), I can set the model to the following ?

-model 'group*condition+(1|Subj)+(1|Subj:condition)+(1|Subj:method)'

Yes, that would be a proper specification with two within-individual factors. For more detailed guidance, you can refer to this discussion.

Gang Chen

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