Hi Kutay, I've done psy222, but this was when it was a yearly subject worth 4cp. I think Skittled, MJ and Clairegirl may have done the half year unit.
Overall, it is a fair bit harder than stat170 but its doable if you study hard. Like most stats units i've done, i have seen people who are good at maths going average and people who arent good at maths go well, so its hard to predict :/
I think the structure now is a mid and end year test, and also 2 optional tests (which i recommend you do, as it takes less stress out of doing the yearly). Nt sure about the weightings...
anyone? :/