Anchoring Bias
A cognitive error in which a clinician over-relies on the first piece of information obtained (e.g., a prior psychiatric diagnosis) and fails to adequately consider alternative diagnoses in an emergency psychiatric evaluation.
Full Definition
Anchoring bias occurs when a clinician fixes too heavily on an initial impression or diagnosis, which then disproportionately influences subsequent clinical reasoning. In emergency psychiatry, this is particularly dangerous when a patient's psychiatric history leads staff to attribute new symptoms to a known condition rather than investigating organic or medical causes. Editors reviewing emergency psychiatry documents should recognise this term in case reviews, quality improvement reports, and root-cause analysis narratives. It is distinct from confirmation bias, where clinicians seek information that supports a pre-existing hypothesis. Both represent forms of cognitive error relevant to patient safety literature in this specialty.
Usage
Usage note: When editing clinical narratives or case reviews, confirm that 'anchoring bias' is not conflated with 'confirmation bias'; they are related but distinct error types.
In Context
- "The root-cause analysis identified anchoring bias as a contributing factor after staff attributed the patient's altered mental status solely to known schizophrenia rather than ruling out encephalitis." — Quality improvement report
- "Training modules on anchoring bias are now mandatory for all emergency psychiatry residents following the sentinel event review." — Clinical education document