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Zorluk: OrtaHuman Factors and Cognitive Biases

A 42-year-old woman presents to an ambulatory primary care clinic complaining of a persistent cough and mild chest discomfort for the past three weeks. She has no significant past medical history and is a lifelong non-smoker. Her vital signs are within normal limits, and physical examination reveals clear lung fields bilaterally. Over the past month, the evaluating physician has unexpectedly diagnosed two young, non-smoking patients with advanced lung adenocarcinoma. Influenced by these recent and emotionally salient cases, the physician immediately refers the patient for a contrast-enhanced CT scan of the chest to rule out malignancy, bypassing a standard chest radiograph and ignoring the much higher statistical likelihood of a post-viral cough. Which of the following cognitive errors is most likely driving this physician's diagnostic approach?

  1. A
    Anchoring bias
  2. Availability heuristicCevap
  3. C
    Confirmation bias
  4. D
    Framing effect
  5. E
    Premature closure

Cevap

Availability heuristic
The correct answer is the availability heuristic. This cognitive error occurs when individuals judge the frequency, probability, or likelihood of an event based on how easily examples come to mind. In clinical practice, this often manifests when a physician has recently encountered a rare, severe, or emotionally impactful case, causing them to overestimate the prevalence of that disease in subsequent patients. In this scenario, the physician's recent diagnoses of lung cancer in young non-smokers disproportionately influence their clinical reasoning, causing them to bypass the standard evaluation of a persistent cough and inappropriately order a high-radiation, high-cost CT scan.

Adım Adım Çözüm

1
Analyze the patient's clinical presentation and the physician's management.
The physician is ordering an advanced, high-cost imaging test (CT scan) for a low-risk patient with a common symptom (cough), bypassing standard stepwise evaluation.
To identify the deviation from standard clinical guidelines.
2
Identify the contextual trigger influencing the physician's decision.
The physician recently diagnosed two rare cases of lung cancer in similar demographic groups over the past month.
To determine the psychological or systemic factor driving the inappropriate diagnostic testing.
3
Match the physician's behavior to the correct cognitive bias definition.
Basing the estimated probability of a disease on the ease with which recent or catastrophic examples can be recalled is the definition of the availability heuristic.
To select the specific cognitive error from the available choices.

Anahtar Kavram

The availability heuristic is a cognitive bias where a physician estimates the probability of a disease based on recent, memorable, or emotionally salient experiences, often leading to over-testing or misdiagnosis of rare conditions.
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Human Factors and Cognitive Biases

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