Insanity within psychology | Psychology homework help

Compare the legal definition of insanity with the psychological concept of mentally ill. What guiding principles and tools are used by psychologists to determine if a client meets or does not meet the legal definition of insanity? What are the limitations of these methods?

Using 200 words please describe and use source(s). 

Compare the legal definition of insanity with the psychological concept of mentally ill. What guiding principles and tools are used by psychologists to determine if a client meets or does not meet the legal definition of insanity? What are the limitations of these methods?

Using 200 words please describe and use source(s).