Beyond the Biomedical Model
For much of the 20th century, the biomedical model explained illness almost entirely through biological causes like pathogens, injuries, and genetics. In 1977, George Engel challenged this view with the biopsychosocial model, arguing that health emerges from three interacting domains.
| Domain | Examples |
|---|---|
| Biological | Genetics, pathogens, physiological state |
| Psychological | Beliefs, emotions, coping skills, behavior |
| Social | Socioeconomic status, culture, relationships |
The SAME diagnosis plays out differently based on context. Chronic pain, for instance, depends heavily on coping style, beliefs, and supportive relationships, not just tissue damage.
The WHO defines health as complete physical, mental, and social well-being, an explicitly positive standard requiring all three domains.
The Power of Interaction
A common pitfall is treating the model as merely biology plus a little psychology. The framework insists the three domains genuinely INTERACT, meaning they actively shape one another rather than sitting side by side.
Interactions in action:
- Psychological to biological: Chronic stress raises cortisol levels and impacts immune function.
- Social to psychological: Social isolation significantly increases the risk of clinical depression.
Under this view, patient care shifts from merely treating physical pathology to addressing the full spectrum of human experience to achieve true health and well-being.