Amanda Bynes -- I Want to Be a Trojan Shrink

Amanda Bynes has her sights set on USC and the psychology department ... but this time not as a patient.

Amanda took a VIP tour of the campus Wednesday and we're told she told the folks with whom she interacted she wanted to enroll in the school as a psych major.

It makes sense ... Amanda has had more than her share of interactions with shrinks over the last two years. A staffer from the admissions department told TMZ ... the school does not hold mental illness against any applicant ... if they're qualified and able to engage in studies, that's all that matters.

As for her tour ... several students saw her on the golf cart tooling around campus with headphones, singing "Roar" by Katy Perry.