Availability Heuristic in AP Psychology judging by what comes to mind.
The availability heuristic is a mental shortcut where you judge how likely something is by how easily examples come to mind. This availability heuristic AP Psychology definition guide shows the contrast with representativeness and the traps to avoid.
What is the availability heuristic?
The availability heuristic is a cognitive shortcut in which people estimate how likely or how common an event is based on how quickly examples come to mind. Amos Tversky and Daniel Kahneman described it. Vivid, recent, or emotional events feel more common than they are because they are easier to recall.
Everyday examples
Availability versus representativeness
Both are heuristics from Tversky and Kahneman, and the AP exam loves to contrast them. The availability heuristic uses ease of recall: I can think of examples, so it must be common. The representativeness heuristic judges by similarity to a prototype: this fits my mental image of the category. Read the vignette for which cue the person is using.
How AP Psych tests the availability heuristic
Multiple-choice vignettes describe someone overestimating a risk because of memorable examples, and the answer is the availability heuristic. Free-response questions may ask you to apply it to a scenario. Name the heuristic and tie it to ease of recall, not to logic or full statistics.
Frequently asked questions
Quick answers — written by humans, not a chatbot.
Who discovered the availability heuristic?
Amos Tversky and Daniel Kahneman identified it in the early 1970s as part of their work on judgment under uncertainty. Kahneman later won a Nobel Prize for this line of research.
What is the difference between availability and representativeness?
The availability heuristic judges likelihood by how easily examples come to mind. The representativeness heuristic judges by how well something matches a prototype. AP vignettes test whether you can tell which shortcut a person is using.
Is the availability heuristic always a mistake?
No. It is a fast shortcut that often works well. It only leads to errors when the examples that come to mind easily are not actually representative of the true frequency, such as overestimating rare but dramatic events.