Revision 8 for 'Cognitive bias in diagnostic radiology'

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Cognitive bias in diagnostic radiology

Cognitive biases have a complex and significant impact on the perception of examinations within diagnostic radiology. The following are some of the more common cognitive biases that can affect day-to-day decision making 1.

Anchoring bias

Anchoring bias is the tendency for one to focus on salient evidence upon the initial stages of the diagnosis leading to the diagnosis. Anchoring bias can also be heuristic in nature.

Automation bias

 

Availability bias

Availability bias is the process in which one is to pass judgment more frequently if this information is readily available in the mind.

Confirmation bias

Having a predetermined diagnosis in mind, then looking for evidence that supports this predetermined idea.

Representativeness bias

Making a judgment on an aspect of an image that is based on one's own perception of what that represents. Representativeness bias as the description suggest can also be heuristic in nature.

Search satisfaction

Search satisfaction is the tendency to cease a search early due to early findings satisfying the reader. Satisfaction of search (SOS) errors have been reported to account for 22% of diagnostic errors 2.

Framing bias

Framing bias is in which the reader is influenced by the clinical question. For example, a well-written request form detailing the exact pathology expected, may influence the reader's decision. 

Outcome bias

A tendency to favor a less severe diagnosis based on empathy for a patient.

Zebra retreat bias 

A reader will not make a rare diagnosis, which is otherwise supported by the available evidence due to a lack of confidence.

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