Linda Lieberman is a U.S. National Park Service ranger with years of experience interpreting nature for National Park visitors. This Summer, we met her in Glacier Bay National Park, Alaska, and she led us on a glacier cruise where we saw lots of wildlife, including a grizzly bear and her cubs, foraging on the rocky beaches for mussels and other delicacies.
Linda told us that she’s learned from park visitors over the years that the rock you are staring at can become a bear, and perhaps just as often, the bear you’ve spotted becomes a rock.
Representativeness—Letting what is most typically true influence what you see and don’t see, e.g. the symptoms commonly associated with a problem will always be there
- Assuming a different culture, group, organization, or person will do what we would in the same circumstances
- Missing discontinuities-clues to potential sudden shifts and breaks in patterns hidden from us by what seem like the much clearer evidence of familiar patterns
- Assuming a change you’ve observed is representative of what’s going on, because it’s part of your life or experience, e.g. “everybody is composting household food waste”
Availability—Being influenced by the patients recently seen, e.g. the last five cases had the flu, so this one must also
- Assuming that history repeats itself
- Using a narrow worldview to interpret the unknown—“people won’t like that”
- “We tried that already”—something I think is similar to this idea didn’t work before, so it won’t work this time
- Straight line trend extrapolation—the trend will continue because of the past record, with do sharp breaks, changes of directions, and so on
Affective error—Making decisions based on what the doctor wishes is true, affected often by an emotional sense, e.g. the patient reminds me of me, the patient is a young healthy guy, and can’t be all that si
- The thing I know and care about (change in my lifestyle, e.g.) is typical and represents the bigger picture future
- Wishful thinking, everything will work out ok
- Our product/technology is the future—because we love it, it must be the best fit for the situation and the best choice for the future