Before you jump into it, it might be early, but have u given a
thought to the profession you would want to be in? And how then
would studying Psychology help u achieve this goal? Also, do bounce
the idea around and not keep it set in stone.
Stats and maths, while not exactly the same, but not dissimilar
either. You could say they are cousins.
If you ask me what subjects helps in Psyc, well you will need to
take bio psyc. Thus, biology would be a slight plus, but not a lot.
A good command of English coupled with good writing skills would be
helpful as there are a lot of written assignments. And lastly,
Math. Beyond that, work hard and get a good honours because u need
that to be a certified psychologist. A degree is not enough.
http://www.singaporepsychologicalsociety.org/psychologists.cfm
i attached a link for you. do check it out