Psychology is related to emotional, behavior, and human brain.
In clinical psychology, you'll study on how the human brain become illness.
Human brain is one of the factor that lead to misbehavior, swinging emotional, illness and so on. It's a complex organ even scientists dont have a full details bout it.
Other than human brain, hormons also a factor related to biology.
Anyway, psychology is a large field, you couldnt define is it a art field or a science field. It depends on which field you would involve in.
If you're doing research, statistic which is maths also will be involved.

This post has been edited by zeusag: Nov 15 2010, 12:28 PM