An exploratory approach that aims to study the relationship between psychological, behavioral, and physical factors by observing phenomena occurring in their natural context without direct experimental intervention by the researcher. These studies are characterized by their ability to provide realistic, long-term data on how psychological stress, emotions, and coping patterns affect the onset and development of physical symptoms and chronic diseases. These include observing people in daily life or in clinical settings to gather information about behaviors, emotional responses, and social support factors, and linking this information to physiological and biological indicators such as hormone concentrations, blood pressure, and immune system activity. Observational studies reveal recurring patterns and temporal changes in the mind-body relationship, providing a basis for understanding the factors that contribute to the development or exacerbation of psychosomatic illnesses. They are also used to monitor the effects of preventive or therapeutic programs on mental and physical health without the need for rigorous experimental design, making them useful for studying phenomena that are difficult to control experimentally for ethical or practical reasons. By analyzing the data, researchers can develop precise hypotheses about the mechanisms of interaction between emotions, behavior, and bodily functions, as well as provide therapeutic and preventive recommendations based on careful observation of the interrelated nature of psychological, physical, and social factors.