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Introduction to Health Psychology: Biopsychosocial vs. Biomedical Models

Explore the field of health psychology, contrasting the biomedical model with the biopsychosocial model. Learn about health behaviors, epidemiology, and the role of psychologists in promoting wellness and managing illness.

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What determines whether a person stays healthy, why they fall ill, and how they respond to a diagnosis? For decades, the medical community focused almost exclusively on biological malfunctions. However, as our understanding of the human experience has evolved, a new field has emerged to bridge the gap between the mind and the body: Health Psychology.

Health psychology is the branch of psychology devoted to understanding the psychological influences on how people maintain health, why they become ill, and how they respond to illness. It is a field that views health not merely as the absence of disease, but as an active achievement of physical, mental, and social well-being.

The Shift in Medical Paradigms: Biomedical vs. Biopsychosocial

To understand health psychology, one must understand the shift from the traditional biomedical model to the modern biopsychosocial model.

The Biomedical Model

For much of the last 300 years, the biomedical model has governed medical practice. This model is characterized by:

  • Reductionism: It reduces illness to low-level processes, such as disordered cells or chemical imbalances.
  • Single Causal Factor: It explains illness primarily through biological malfunctions.
  • Mind-Body Dualism: It assumes that the mind and body are separate entities.
  • Illness Focus: It emphasizes the presence of disease rather than the promotion of health.

The Biopsychosocial Model

In contrast, the biopsychosocial model views health and illness as the result of a complex interplay between biological, psychological, and social factors.

Biomedical ModelBiopsychosocial Model
ReductionisticMacrolevel as well as microlevel
Single causal factor consideredMultiple causal factors considered
Assumes mind-body dualismMind and body inseparable
Emphasizes illness over healthEmphasizes both health and illness

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