Avira > Rav belsky told me that a frum person studying psychology is allowed to do so and “not be gores” garbage that is part of the course – now i don’t know if this psak applies only to someone who sat and learned for years in yeshiva,
This seems somewhat different from Rabbonim who davka insist that good learners stay learners.
R Twersky asked Steipler about medical school and Steipler suggested, if I recall correctly, learning a high-quality hevrusa, learning mussar (or chassidus?), and going to a mikva regularly.
But psychology may be on the riskier side, especially as it is a generic major taken by people with no specific plans, so curriculum is broad and shallow. This might make sense if going to a top college and planning for a PhD. Otherwise, going for one of the health sciences may be more practical and results in classes in audiology instead of “psychology of upper volta minorities”