Psy 104 and 105 students have to do this for similar proportions of their marks, too. I was hooked up to a virtual reality machine and told to walk across a room, on a collision course with a (virtual) person waking toward me... Lots of fun!
That was one of the more interesting ones, anyway! Generally, they tended to involve filling out a fair few questionnaires about you and your life for the 4th year honours/postgrad/research students.
...however, this might be different for you, given that's for psych. Dont' know if the ling and psych studnets are all in the same system, or whether they're separate.
If they're separate, you'd presumably be exposed to more ling-y experiments ...but I haven't got any examples to help you out with, though! (And, on that note, would love to hear what they do, if you are!)...