Hi Gang,
Thank you for suggesting this analysis.
I ran it, but I am still puzzled about some aspects:
1) The terms "(Oxytocin|subject)" and "(Pleasantness|subject)" that you suggest are to be interpreted as random slope of oxytocin (and pleasantness) across subjects with correlated intercept? How does that change the regression equation?
2) I have a significant interaction effect between Oxytocin and Pleasantness? How do I interpret and visualise that?
3) Same thing for the 4way interaction "Session*Velocity*Pleasantness*Oxytocin".
Generally speaking, how can I simulate the statistics of this model in excel starting from the beta values of the 2x2 conditions (Sessions X Velocity) and respective quantitative variables (Oxytocin and Pleasantness)?
