I have been told that there is a correlation between being a good teacher and being a good researcher (like this paper, in page 15, point 3.6), but i have not found any references or studies about it.
Does any know if there is really such correlation, or have studies to confirm or deny it?
I would to add a review point to the discussion that could imply a negative correlation. Teaching students takes empathy, understanding that they do not yet understand and what makes them not understand. A top researcher has probably not experienced this when he/she was in school. Lesser researchers might be better at understanding why a student doesn't get it. Also, a good mind does not imply excellent communicative skills. I would say the correlation is non-existing or slightly positive.