I want to compute the correlation between two variables (ex. A and B) across all my participants. Because my observations are not independent because I have multiple observations per participant, I computed a repeated measures correlation using pingouin python package.
I plotted the repeated measures correlation in my dataset using the plot_rm_corr function from pingouin. However, the lines across the subjects seem all parallel. It's also seemed to be the case in pingouin documentation. Is this normal ? Could someone please explain the reasoning ?
Thank you !
