A Quality Assurance Committee Is Establishing Best Practices for Ordering

A quality assurance committee is establishing best practices for ordering various laboratory and imaging studies in an emergency department.  They find that one physician orders significantly more CT scans of the head compared to other physicians in the department.  The physician states that he orders more head CT scans on young patients with chronic migraines, even those with normal examination and unremarkable history, because he recently missed a diagnosis of intracranial bleed in an 18-year old patient with a history of chronic migraines.  Which of the following most likely explains this physician's tendency to now order excessive CT scans of the head?

A) Availability bias
B) Data misinterpretation
C) Documentation error
D) Knowledge deficiency

Correct Answer:

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