I have done this. I took two psychology courses at Harvard University when I was getting my undergraduate degree there. I took introduction to psychology and the biopsychology of sleeping and dreaming. I don't remember the exact course title of the latter course, but this was approximately it.
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I've always been interested in this subject since a young age but prioritised art & music before it. I would love the chance to explore it & actually study it part-time now that I possibly can considering the position I'm in at the moment.