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Mental Models

Information as Homeostasis

The source uses homeostasis as an analogy for information sharing. In relationships such as medical care, sharing knowledge and listening to concerns can help participants make decisions despite differences in expertise and power.

THE IDEA

The Biological Model

Biological systems maintain homeostasis through constant information exchange—from skin sensations to blood potassium levels. Without accurate information, the body cannot function properly. This principle can be applied to understand which situations might benefit from information to maintain equilibrium.

Application to Healthcare

In the traditional doctor-patient relationship, an information and power asymmetry exists. Doctors have more medical and procedural knowledge, leading patients to be passive participants. Involving patients means explaining the options, uncertainties, and tradeoffs that matter to them. The source’s discussion of "Tolerating Uncertainty," for example, emphasizes that diagnoses and treatment responses are not always predictable. Patients need room to weigh consequences that they will experience directly.

Shared Decision Making (SDM)

SDM is a process that does not put responsibility on one party but provides resources for doctors and patients to reach decisions together. A 1997 paper describes SDM as “a mechanism to decrease the informational and power asymmetry between doctors and patients by increasing patients’ information, sense of autonomy and/or control over treatment decisions that affect their well-being.” For informed choices, patients need to understand benefits and harms, may require support, multiple opportunities to hear information, ask questions, and processing time.

Elements Affecting Information Flow

Achieving information equilibrium requires more than raw data. Trust is essential for information to be accepted and processed. A 2014 analysis of NICU experiences found that parent dissatisfaction often stemmed not from poor medical care but from unacknowledged needs. Small actions like using a baby’s name or recognizing parents’ caregiving role foster a communication environment where information can be heard and understood, supporting complex, emotionally charged medical situations.

When to use it

  • Medical treatment decisions with multiple options and uncertain outcomes.

  • Business partnership negotiations where one party holds significantly more data or expertise.

  • Family caregiving for a relative with a chronic illness, involving multiple specialists and treatment paths.

  • Classroom settings where educators share learning pathways and assessment criteria to empower student choice.

FROM THEORY TO EVERYDAY LIFE

In practice

01

Cancer Treatment Choice

A patient diagnosed with early-stage breast cancer is presented with options of lumpectomy plus radiation or mastectomy. Using SDM, the doctor explains the survival rates, cosmetic outcomes, recovery times, and long-term risks of each. The patient, with her values of body image and fear of recurrence, collaborates to choose the option that maintains her quality of life while managing the disease.

02

NICU Communication

In a neonatal intensive care unit, parents are given daily updates using their baby’s name, their caregiving efforts are praised, and complex medical terms are explained with visual aids. This builds trust and ensures the parents can actively participate in decisions about procedures, feeding, and discharge planning, leading to reduced anxiety and better family outcomes.

✳

A MOMENT TO REFLECT

Put it to work.

  1. How can you apply the concept of information as a homeostatic mechanism to improve communication in a power-imbalanced relationship?

  2. In a high-stakes decision of your own, what additional information could bring more equilibrium among the participants?

  3. Reflect on a time when insufficient information led to a poor outcome; how might a shared decision-making approach have changed things?

References

  1. Shared Decision Making (1997 paper) — Unknown (1997)
  2. Parent Experiences in Neonatal Intensive Care Units — Unknown (2014)

CONTINUE THE CONVERSATION

Source texts

  • The Great Mental Models Volume 3 Systems and Mathematics
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