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I have 8 subjects. They were all tested under 2 different conditions, 5 sessions of each, with 14 trials in a session. Total data points: 1120. No data is missing. 2 dichotomous DVs were measured every trial (Did they make a response? and Did they do the task correctly?). I want to know if responding predicts correct task performance, or at least if they correlate. Would I need to use mixed-effects modeling?

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Yes, you want some sort of mixed effect model but questions about SPSS code are off-topic here.

I prefer the term multi-level model; you need one because the data are not independent.

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  • $\begingroup$ Apologies for the SPSS question. It's been deleted. But a bit more on the sort of stats I should be using would be helpful. Could I do a multi-level logistic regression, for example? $\endgroup$
    – Anna Casey
    Commented Feb 18, 2017 at 20:28
  • $\begingroup$ Yes, since the DVs are dichotomous, that seems right. $\endgroup$
    – Peter Flom
    Commented Feb 19, 2017 at 14:29

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