The study of psychology was fundamental to the understanding of human behavior and mind as early as 1000 BC (Rescorla). With its wealth of research and studies, psychology has provided valuable information about the human mind and how it works. These insights, however, are based on many psychological models and require a comprehensive understanding of all psychological models to be successfully applied to understanding human behavior. The four main models of psychology are the biological model, the psychodynamic model, the cognitive model and the behavioral model. Each model brings its own unique take on psychological concepts, but more often than not each model attempts to distance itself from other models while attempting to present itself as a superior model. The biological model appears to be the worst culprit in this separation as it relies too much on prescription drugs and medical intervention and ignores other treatment methods that could be much more effective. Evolving these models separately appears to severely limit the value of psychological research as integrating all models could reveal valuable insights for the psychological community. Each model has differentiated and converged on its own theories and practices, but has done so separately and isolated from each other. This separation of psychological models is most clearly demonstrated by the biological model, which relies heavily on biological methods and ignores other valid research approaches. mental disorders. The branch of biological psychology appears to evolve more separately from other models as it rarely consults other models for insights that biology cannot explain. Among the most influential founders......half article......2009 .Rescorla, Leslie."Cognitive Model." Abnormal psychology. Bryn Mawr College, Bryn Mawr.Rescorla, Leslie A. "History of Psychopathology from the Middle Ages to the Nineteenth Century." Abnormal psychology. Bryn Mawr College, Bryn Mawr. January 26, 2009.Rescorla, Leslie. "Biological model". Abnormal psychology. Bryn Mawr College, Bryn Mawr.Shoja, MohammadaliM. and Shane Tubbs. “The Disorder of Love in the Canon of Avicenna (980-1037 AD).” The American Journal of Psychiatry (2007): 228-29. Schueler, Gerald J. and Betty J. Schueler. "Psychological terms". Schuelers Online. May 12, 2009. “The biological model." Making the Modern World. 2004. The Science Museum. May 122009 .