Cognitive bias: anchoring on first diagnosis despite conflicting signs
What it is
Anchoring is a cognitive bias where you lock onto an initial impression/diagnosis ("the anchor") and then insufficiently adjust when new information appears (e.g., tests, radiographs, symptom pattern) that should push you toward a different diagnosis. This commonly overlaps with premature closure (stopping the diagnostic process too early). Dental examples: • "It's the deep restoration" → you proceed toward endo even though pain is mainly on biting and there's a narrow isolated probing defect (possible crack/VRF) • "It's sinus pain" → you delay dental diagnosis despite reproducible percussion tenderness and a clear periapical change • "It's irreversible pulpitis" → you ignore a normal/negative cold response and focus only on the patient saying "cold hurts" (triangulation failure)
Why it happens
• Fast pattern recognition (System 1) gets you to a quick answer, but you don't switch to slower analytic checking (System 2) when data conflicts • Time pressure / high workload → less deliberate reflection and fewer "rule-out" steps • Satisfaction with a plausible story ("this fits") + premature closure • Prior labels (another clinician said "it needs RCT") bias your interpretation of new findings
The full clinical mistake entry includes
- How to avoid it — the prevention protocol
- The clinical tip experienced clinicians use
- The documented reference behind the mistake
More clinical mistakes
Dentalverse is an educational resource for dental students and dentists. This page is a study reference — it is not medical advice and does not replace clinical judgment. Always follow your institution's protocols and your supervisor's guidance.