Which statement describes anchoring bias in clinical reasoning?

• A. The clinician updates diagnosis frequently as new data arrives.
• B. The clinician ignores initial information and starts over with every new test.
• C. The clinician anchors on the first information and fails to update when new information arrives.
• D. The clinician uses only objective tests.

Answer: (C)

Anchoring bias in clinical reasoning is when the clinician latches onto the initial piece of information and then fails to adjust their thinking as new data come in. The best description here is the one that says the clinician anchors on the first information and does not update their hypothesis when new information arrives. This pattern leads to persisting with an early impression even in the face of contradictory findings, which can misguide diagnosis and treatment.

For example, if a patient presents with leg pain and the clinician quickly fixes on a single diagnosis based on initial symptoms, they may overlook later test results or exam findings that point to a different cause. The other statements describe different approaches: updating the diagnosis as new data arrive shows flexible reasoning, starting over with every new test reflects a lack of commitment to an initial impression rather than anchoring to it, and relying only on objective tests emphasizes data type over the reasoning pattern, not the tendency to cling to initial information.