There's no way we can answer credibly.
Read the RHU forum or contact the undergrad admissions department to enquire about the status of your application.
I had to wait until a few days ago to get the last of my offers. You can't really say it's good or bad news. They just simply haven't gotten around to it yet. The admissions office are probably going through each subject in turn. They'll probably get to psychology over the Easter holidays.
At least you don't have to reply until later!