Health and illness are never purely biological matters — psychological and social factors shape disease risk, illness experience, treatment adherence, and recovery at every stage. PSY8610 establishes the foundational framework for understanding this interplay and the psychologist's growing role in addressing it.
The biopsychosocial model
George Engel's challenge to the purely biomedical model
- Beyond the biomedical model: PSY8610 covers Engel's influential 1977 critique of the dominant biomedical model (which explained illness solely through biological pathology) and his proposed biopsychosocial alternative, integrating biological, psychological, and social factors as jointly necessary for understanding health and illness
- Reciprocal influence across levels: The course examines how these three levels interact bidirectionally — psychological stress can produce measurable physiological changes contributing to disease, while biological illness in turn produces psychological and social consequences that further affect health trajectory
- Clinical application: PSY8610 frames the biopsychosocial model as directly actionable for case conceptualization, requiring assessment across all three domains rather than a purely biomedical or purely psychological lens
Health behavior change theories
The course covers established theoretical models explaining and predicting health behavior change, including the Health Belief Model (which proposes that health behavior is influenced by perceived susceptibility to a health threat, perceived severity of that threat, perceived benefits of the recommended action, and perceived barriers to taking it), the Transtheoretical Model/stages of change (precontemplation, contemplation, preparation, action, and maintenance, with motivational interviewing strategies tailored to a client's current stage), and social cognitive theory's emphasis on self-efficacy as a central determinant of whether a person initiates and sustains health behavior change.
Stress and illness pathways
PSY8610 examines the well-established physiological pathways linking psychological stress to disease risk, including the hypothalamic-pituitary-adrenal (HPA) axis and chronic cortisol elevation, sympathetic nervous system activation, and the cumulative concept of allostatic load (the physiological wear from chronic or repeated stress activation). The course connects this physiology to behavioral and psychosocial mediators, including stress-related effects on immune function, sleep, and health behaviors (smoking, diet, substance use) that further compound disease risk, alongside protective factors including social support and effective coping strategies.
Integrated behavioral healthcare
PSY8610 addresses the psychologist's expanding role within integrated, collaborative care models embedding behavioral health services within primary care and other medical settings — addressing the high prevalence of psychological factors in primary care presentations, the bidirectional relationship between mental and physical health conditions, and the practical and financial barriers integrated care models aim to reduce by co-locating behavioral health support directly within medical treatment settings rather than requiring separate, often poorly coordinated referral pathways.
PSY8610 assignments include biopsychosocial case formulations, health behavior change plans, and integrated care model analyses
Our health psychology specialists deliver clinically grounded academic support for PSY8610.
Get Help With PSY8610
Biopsychosocial case formulations, health behavior change plans, integrated care model analyses, stress-illness pathway papers.
Place Your OrderView All ServicesRelated courses
Frequently asked questions
PSY8610 spends substantial attention on this question because the biopsychosocial model's significance is easy to understate if it is reduced merely to the platitude that "psychological and social factors matter too" — Engel's actual 1977 argument was considerably more pointed and, at the time, genuinely challenged the dominant assumptions of medical practice and training. The biomedical model that Engel was directly responding to held, often implicitly, that disease could be fully explained and adequately treated through identifying and correcting a specific biological abnormality — a pathogen, a lesion, a biochemical deviation — with psychological and social factors treated as largely irrelevant to the "real," biological disease process, or at most as secondary considerations affecting only the patient's subjective experience of an underlying condition whose actual cause and cure were understood as purely physical. Engel argued this model was not merely incomplete but actively reductionistic in a way that produced poorer clinical outcomes and poorer scientific understanding: it could not adequately explain why two patients with biologically identical conditions often show markedly different illness trajectories, treatment adherence, symptom reporting, and recovery, and it systematically excluded from serious clinical consideration the psychological and social variables that were often centrally relevant to those very differences. Engel's proposed alternative did not simply add psychological and social factors as decorative context around a fundamentally biological core; it insisted these three levels are mutually interacting and jointly necessary for adequately understanding any case of illness, meaning a clinician cannot achieve an adequate, complete picture of a patient's health by gathering only biological data and treating psychological or social information as optional supplementary material to be collected only if time and interest permit. The practical clinical requirement PSY8610 draws from this is that biopsychosocial assessment must be systematic and structured across all three domains for every case, not selectively applied only when a case seems to obviously involve "psychological factors" — a patient presenting with a clearly identifiable biological pathology (a fractured bone, a diagnosed infection) still requires assessment of psychological factors (health beliefs, coping style, mental health comorbidities affecting recovery and adherence) and social factors (social support, socioeconomic barriers to following treatment recommendations, cultural health beliefs) as a routine and integral part of case conceptualization, not as an afterthought pursued only once the "real," biological matter has been addressed. This is precisely why the biopsychosocial model is treated as foundational rather than supplementary across health psychology: it reframes what counts as a complete clinical picture in the first place, rather than simply recommending that biomedical clinicians also be somewhat sensitive to their patients' feelings.