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I have data corresponding to reports of "mind wandering", i.e. thinking about something unrelated to the task, and I want to look at the link between these reports and trust (regarding a system capability). For each subject, I have 25 values of mind wandering (binary variable) and trust (range between 1 and 5).

I firstly used a Kendall rank correlation, however someone told me that it would not account for repeated measures. That same person told me to use logistic models.

I am not entirely sure that looking at logistic models would tell me the same thing as correlation test. However I have never done logistic regression, and so I am a bit lost with the possibilities offered by the technic. Is there a possibility to make correlations accounting for repeated measures?

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Yes, you can separate the subject data samples and compute the means, then calculate the correlations between the means.

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  • $\begingroup$ Thank you for this answer. I agree that this would solve the problem, however I think it would lower the sharpness of our test by aggregating (and therefore loosing) much data. $\endgroup$ – Pyxel Jun 22 '18 at 14:45
  • $\begingroup$ Have you tried the split-plot ANOVA, what about MANOVA and /or Mixed models approached $\endgroup$ – Dr. Eldard Mukasa Jun 22 '18 at 15:46
  • $\begingroup$ Thank you for your comment! However, as I explain in the original post, I don't know if the results would be similar to a correlation. For example, if I have a significant predictor in my mixed effect model, I can say that this predictor influences my dependent variable (and only linearly). However can I say that my variable and my predictor are correlated? I don't think so. $\endgroup$ – Pyxel Jun 23 '18 at 16:47
  • $\begingroup$ If the predictor can directly and linearly influence the dependent variable , then correlation exists. Only check the magnitude $\endgroup$ – Dr. Eldard Mukasa Jun 25 '18 at 5:49
  • $\begingroup$ I agree with you on that, however a correlation can also exist without linear influence (e.g. a quadratic relation would be revealed by a correlation test, but not by a linear model). $\endgroup$ – Pyxel Jun 26 '18 at 8:28

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