I remember reading a study done about doodlers and their retention rates. The study found that people who doodle when listening had a higher retention rate of t

I remember reading a study done about doodlers and their retention rates. The study found that people who doodle when listening had a higher retention rate of the information. I cannot remember where I read it so I don't know how rigorous the study was though. But this seems in line with your anecdotal evidence.