Definition of Psychology: Psychology is the scientific study of human activity. "Parliament of the scientific study of psychology because since we try to make an approach subject to the requirements of scientific methodology in use (formulating hypotheses, comparing them , etc.).. Parliament of human psychology that includes the study of behavior (observable behavior as a movement, verbal behavior, nonverbal behavior, etc.). the study of cognitive processes and of emotions. Research in psychology the scientific study to which we referred above typically includes a series of stages: the formulation of the problem, formulating hypotheses or objectives, defining the variables, the establishment of research design, execution of research design, obtaining results, data analysis and obtaining of conclusions. A final stage of this procedure include the fact to publicize the conclusions reached.The main theoretical frameworks in psychology major theoretical frameworks in psychology is psychoanalysis, behaviorism and cognitivism. Psicoanà the lysis is a current theory that emerges at the end of the century Century, that starts from a medical point of view, and he understands the culture and society repress natural instincts of human beings. From this point of view, its object of study are the deviations of human behavior from an intrapsychic perspective. The current theoretical behaviorism is born at the beginning of the century Century and focuses on the study of observable behavior. From this standpoint, the main object of study are the laws that govern learning. Cognitivism focuses on the study of mental processes. From this point of view, devotes its efforts to explain the functioning of cognitive processes such as perception or thought.

The biopsychosocial model: Since this model considers the health and disease are the poles of a continuum and are determined by biological factors, psychological and social. That is, health must be understood as a process whereby the person develops the best of your ability, status as a relative involving both individual and social and cultural aspects. Stamped therefore talking about a matter of degree on a continuous scale that most of the (health), at least (the disease) and supports many variations in between. The relevance of applied psychology in the field of health. The inclusion of psychology in the health field stems not only from a desire, is the result of the change in the conceptualization of health and health systems. Specifically, the factors that have contributed to the integration of psychology and psychologists in the health field are:The biopsychosocial concept of health, which implies the need to incorporate the social and psychological. The change in Mé most frequent causes of morbidity and mortality Ents whose result, check that what people do is an important determinant of health and disease, and that creates the appearance of a new type of disease, the chronic patient. The growth of health spending is not accompanied by improvements in health status. The application of assessment procedures and psychological treatment, especially those derived from cognitive and behavioral therapies in many health problems with highly positive results. Definition of health psychology: So while the health psychology focuses on physical illness and the emotional problems resulting from it, the issue of mental health is the focus of clinical psychology.