Cognitive pills for cognitive ills
Being aware of the pitfalls of cognitive errors is the first step to avoiding and mitigating them. “It really does start with preparation and awareness,” Dr. Scarfone said before presenting strategies to build a cognitive “firewall” that can help physicians practice reflectively instead of reflexively.
First, be aware of your cognitive style. People usually have the same thinking pattern in everyday life as in the clinical setting, so determine whether you’re more of a system 1 or system 2 thinker. System 1 thinkers need to watch out for framing (relying too heavily on context), premature closure, diagnostic momentum, anchoring, and confirmation bias. System 2 thinkers need to watch out for commission, availability bias, and base rate neglect.
“Neither system is inherently right or wrong,” Dr. Scarfone reiterated. “In the perfect world, you may use system 1 to form an initial impression, but then system 2 should really act as a check and balance system to cause you to reflect on your initial diagnostic impressions.”
Additional strategies include being a good history taker and performing a meticulous physical exam: be a good listener, clarify unclear aspects of the history, and identify and address the main concern.
“Remember children and families have a story to tell, and if we listen carefully enough, the diagnostic clues are there,” Dr. Scarfone said. “Sometimes they may be quite subtle.” He recommended doctors perform each part of the physical exam as if expecting an abnormality.
Another strategy is using meta-cognition, a forced analysis of the thinking that led to a diagnosis. It involves asking: “If I had to explain my medical decision-making to others, would this make inherent sense?” Dr. Scarfone said. “If you’re testing, try to avoid anchoring and confirmation biases.”
Finally, take a diagnostic time-out with a checklist that asks these questions:
- Does my presumptive diagnosis make sense?
- What evidence supports or refutes it?
- Did I arrive at it via cognitive biases?
- Are there other diagnostic possibilities that should be considered?
One way to do this is creating a table listing the complaint/finding, diagnostic possibilities with system 1 thinking, diagnostic possibilities with system 2 thinking, and then going beyond system 2 – the potential zebras – when even system 2 diagnostic possibilities don’t account for what the patient is saying or what the exam shows.
Enough overlap exists between these cognitive biases and the intrinsic bias related to individual characteristics that Dr. Khan appreciated the talk on another level as well.
“For me, as a brown Muslim immigrant woman of color, I can sometimes see cognitive biases in action with my colleagues and realize that they are oblivious to it,” Dr. Khan said. “It’s really refreshing to see this issue come up and being discussed at the [AAP] National Conference and Exhibition.”
Dr. Scarfone, Dr. Nagler and Dr. Khan have no relevant financial disclosures.
This article was updated 12/8/2020.