I don't quite understand how you're situated though; the AP test is for college credit at whatever college you decide to go to after you've taken psych in high school. You don't have to take a test to get in the AP psych course itself, just good grades. If you have already taken a psych course though, I don't think you can take another; they're the same, the AP course is just more intense. But getting an A or B on the AP test is so whatever college you pick gives you credit for taking a college psych 1 course so you don't have to take that 3 credits. I took the AP European History exam, for example because I was going to major in history. However, I got a "D" :-) so no credit for me. But that has nothing to do with your grade in high school or what courses you took, etc. Theoretically you could teach yourself some course and take the AP test and maybe get credit. It's for college though, not high school.