This branch of psychology has a direct effect on family life because most families attending therapy sessions have or are undergoing stresses and changes that they cannot handle on their own. While some families seek therapy to prevent problems, often the therapy is in response to a problem.
This area of psychology blends the legal system with the psychology department. This area of study allows the student to learn the legal system so she can help lawyers better understand the terms, diagnosis and treatments of psychology patients. This can be used in medical malpractice suits and in mental evaluations by the courts.
This is the science of working with an "unwell" or "sick" patient. In this type of psychology, medical and mental illness is explored, treated and explained. Clinical psychologists often assist with experimental psychology or engage in that type of psychology. This difficult type of psychology often requires more than a graduate degree, but the degree is a starting point for a doctorate degree.