Thanks.
The best I have is that I volunteered to help some graduate students with their senior projects (participating in their experiments/surveys/what have you) but that is nowhere near good enough of course. It would have been better if I'd been able to get an internship at a psychologist's office or helped out in a lab actually doing some sort of research, but I never came across any of those opportunities (or when I did, someone who had better qualifications than me got the job instead).
So I thought I might be able to find an internship after I graduated, but most of them turned out to be designed only with students in mind, which made me ineligible. And most other jobs in the field will ignore you if you never had internship experience, or else they require you to have a master's.
Part of the problem might have been my fault because I probably should have taken uni a little more seriously than I did, but my professors & career advisor were near useless my entire time there. All of a sudden it was my senior year & I just felt completely lost.