Psychological and Biological theories influence social policy making

How do the psychological and biological theories influence social policy making? Is this right? What would you do differently?
Both theories (Psychological and Biological Theories) are utilized in social policy making by enabling a formation of theory to be created to deal with a certain problem or dysfunctional problem in society on the social level. This is initial in the step of testing both theories to confirm whether they are applicable to be used as a social policy. Once accepted the social policy is applied and subsequently evolved to handle the initial problem and other occurrences.
In the contemplation of comprising social policy deviations from norms of society usually trigger that a problem may be coming into existence because of biological and psychological problems of people in an environment that might affect all adversely. The result has a dependence on the nature of stimuli introduced into society. Further merged theories are used to counter issues that occur and these theories are the very basis or starting place for influencing social policy because of uniqueness, versality and ability to be molded to various situations.
Is this right?
The question is it appropriate. I would say that yes this is the first step in attempting to deal with a situation that needs correcting and modifying and I agree that it is right.
What would you do differently?
Nothing, I would do an assessment, study to reflect the propensity to change and proceed to use both theories to try to accomplish goal.

http://www.allaboutpsychology.net/psychological-theory.php
http://en.wikipedia.org/wiki/psychology