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Zorluk: KolayHuman Factors and Cognitive Biases

An internal medicine physician has diagnosed three cases of subarachnoid hemorrhage in the past two weeks, all of which presented with sudden-onset, severe headaches. Today, a 30-year-old man presents to the clinic with a sudden-onset headache. He has a long history of classic migraines with aura and states that this current headache feels exactly like his usual migraines. The patient's vital signs and physical examination are completely normal. Despite the typical presentation of a recurrent migraine, the physician is highly concerned about a ruptured aneurysm and immediately sends the patient to the emergency department for a non-contrast head computed tomography scan and a lumbar puncture. Which of the following cognitive biases most likely influenced the physician's decision?

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

Cevap

Availability heuristic
The availability heuristic is a cognitive bias in which a physician judges the likelihood of a diagnosis based on how easily examples of that diagnosis come to mind. Because the physician recently saw three cases of subarachnoid hemorrhage, this diagnosis is highly 'available' in their memory, leading them to overestimate its probability in a new patient who has a classic presentation for a benign migraine.

Adım Adım Çözüm

1
Analyze the physician's recent clinical experiences.
The physician recently saw three cases of subarachnoid hemorrhage, making this diagnosis highly memorable and easily recalled.
To identify external factors that might be influencing the physician's current reasoning.
2
Evaluate the current patient's clinical presentation.
The patient presents with a headache that is identical to his well-documented past migraines, with a normal physical examination, making subarachnoid hemorrhage unlikely.
To determine the objective pre-test probability of the suspected disease.
3
Match the discrepancy between objective probability and physician behavior to a specific cognitive error.
The physician overestimates the likelihood of a rare disease because of recent exposure. This perfectly describes the availability heuristic.
To correctly identify the cognitive bias being tested in the vignette.

Anahtar Kavram

Identifying the availability heuristic in clinical reasoning
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Konular

Human Factors and Cognitive Biases

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