Jacob is unable to recall any instances of car crashes, but is able to recall a number of plane crashes. Based on this information, Jason concludes that plane crashes are more probable than car crashes. Given that Jacob is making this conclusion on the basis of recalled information, which heuristic is Jacob using to assign probabilities here?

Question

BlackTom AI · Accepted Answer

Question restatement: Jacob cannot recall any car crash instances but can recall several plane crash instances, and thus concludes that plane crashes are more probable. He bases this conclusion on what he can recall.
Option 1 - Availability: This is the idea that the ease with which something comes to mind influences judgments about how common or likely it is. Since plane crashes are easily recalled while car crashes are not, Jacob’s probability assessment is biased by the familiarity/availability of the information.
Option 2 - Recognition: This heuristic suggests that if one of two alternatives is recognized and the other is not, the recognized option is judged to be more likely. In this case, Jacob does recognize plane crashes more readily, but the core mechanism described in the scenario is the ease of recall (availability) rather than a binary recognition judgment between two items. The broader pattern could involve recognition, but the question emphasizes recalled information driving probability judgments, which aligns more directly with availability.
Option 3 - Representativeness: This heuristic involves judging probability by how similar something is to a prototypical example or stereotype. There’s no sense in the scenario that Jacob is comparing plane crashes to a typical plane crash or using a stereotype; the error stems from recall bias, not representativeness.
Option 4 - Anchoring: This heuristic is about basing an estimate on an initial value or starting point and adjusting insufficiently away from it. The scenario does not show Jacob starting from an initial probability or value and adjusting; instead, he relies on what he remembers, so anchoring isn’t the best fit here.

Summary of reasoning: The core effect described is that easy recall (availability) biases the perceived frequency or probability of events. While recognition could be involved in a two-item scenario, the question centers on recall-based probability judgments, which points to the availability heuristic as the best match. The other options describe different cognitive shortcuts that do not align as directly with the described memory-based bias.

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