Realism vs. Naturalism

I was assigned to do a research homework for the difference between realism and naturalism, here is what I got:


From http://www.unm.edu/~hookster/Definitions%20of%20Realism%20and%20Naturalism.pdf

• Realism is used by literary critics in two chief ways: (1) to identify a literary movement; and (2) to designate a recurrent mode of representing human life and experience in literature
• Naturalism is sometimes claimed to be an even more accurate picture of life than is realism. But naturalism is not only, like realism, a special selection of subject matter and a special literary manner; it is a mode of fiction that was developed by a school of writers in accordance with a particular philosophical thesis.

Seems a little bit vague? Yes I agree, so I did more research and put it in simple words:

• Realism is simply  an idea to portray the world exactly as what they are. Its aim is to treat the subject truthfully.
• Naturalism was born from realism. It seeks to portray the world as what they really are. Naturalists view humans in a very objective way; they are very concerned with the underlying forces behind one's behavior and believe that one's environment and heredity shape a person's character.