Abnormal psychology, a sub-field of psychology, has no established core theory, unlike other scientific disciplines such as math, physics, or chemistry (Long, 2009). In order to treat patients with psychological disorders, professionals in the field use knowledge gained from clinical psychology studies, particularly information gained from studies related to psychopathology. Beginning in the 1900's, researchers proposed several theories and treatments of abnormal psychology which centered on the relationship of psychological, physical, and social conditions in the individual and society. During its beginnings, psychology was often studied in conjunction with philosophy, but today it is more commonly applied in the fields of neurology and physiology (Comer, 2003). Modern day psychological theories have found practical applications within the areas of business, personal development, computers, health and even sports. This holds true for the field of abnormal psychology as well. Models

Studies in abnormal psychology follow three different theoretical models (Long, 2009). These models are used to identify and possibly treat abnormal behavior, and are labeled as psychosocial, biological/medical and sociocultural. A brief look at each will define their applications in the discipline.

The psychosocial model deals with an individual's personal interactions with their environment (Long, 2009). Psychosocial study focuses on stress triggers and self-destructive behavior. An example of abnormal reactions to daily situations might include...

The biological/medical model studies the effects of neurological damage, hormones and neurotransmitters with regard to behavior and cognitive function. Some areas of abnormal behavior that fall under biological/medical include Alzheimer's disease, Attention Deficit Disorder and depression (Long, 2009). Sociocultural theories study the effects of societal factors on individuals in an urban setting. One example is the condition of obesity in a world that is promoting physical fitness and healthy choices. Sociocultural studies also explore why people choose soft addictions (e.g. smoking and social drinking), according to Long (2009).
Conclusion

The study of abnormal psychology stems from our natural need to explain behavior which differs from what is acceptable as "normal." Historically, humans have been seeking to understand, cope and treat individuals with abnormal behavior since the beginning of society. As the study of psychology and all its sub-fields have evolved into applied disciplines, theoretical models have helped define specific avenues of research and treatment within the field of abnormal psychology.