Discuss the relative contributions of biological and environmental factors in the development of two different disorders. Organize your essay in the following manner:
(1) Outline and critically evaluate the existing empirical research evidence regarding
(a) what is currently understood about causes of these two disorders, and
(b) what we do *not* currently know, that researchers have yet to learn.
(2) Explain what implications, if any, the research you've jut reviewed has for
(a) intervention with, and
(b) prevention of, the two target disorders.