The availability heuristic is a mental shortcut where the perceived likelihood or frequency of an event is judged by the ease with which relevant instances come to mind. Its parameters are: (1) ease of recall — how quickly and effortlessly examples are retrievable from memory; (2) vividness — how emotionally salient or concrete the available instances are; (3) recency and frequency of exposure — how recently and often the subject encountered related examples. The mechanism persists through psychological instruction, behavioral economics training, media repetition, and experimental replication in the scientific community. It is a category in the taxonomy of cognitive biases, operationalized through tasks measuring how people overestimate the probability of dramatic, media-covered, or personally memorable events. [formal: heuristic | substrate: mind | horizon: a moment | explicit: yes | epoch: 0.60]
Accepted ontology entry
availability-heuristic
The availability heuristic is a mental shortcut where the perceived likelihood or frequency of an event is judged by the ease with which relevant instances come to mind. Its parameters are: (1) ease of recall — how quickly and effortlessly…
Definition
Why it is in scope
A cognitive shortcut where people estimate the frequency or probability of events by how easily examples come to mind. A human-made psychological construct developed by Tversky and Kahneman in 1973 to categorize a systematic bias in human judgment under uncertainty. The concept itself is made — the category, the operationalization, the experimental paradigms — all output of the behavioral science research program.
Names and aliases
- availability-heuristicen · CANONICAL
Relations from this entry
- cmrmwufxy01pxd1nllvxs1o1sINSTANCE_OF →
An availability heuristic is a specific kind of cognitive bias — a systematic deviation from rational judgment that falls under the broader taxonomy of cognitive biases. The specific (availability-heuristic) points at the general (cognitive-bias). INSTANCE_OF direction.
- cmrf51qwi005rcqqtmpyziy84DEPENDS_ON →
The availability heuristic operates by retrieving examples from memory — judging frequency/probability by ease of recall. Remove memory and the mechanism has nothing to retrieve from; the heuristic stops operating entirely. This is a present-tense operational dependency, not just 'needs language to be said'.
- cmrmfdby0002qd1nlh9ok230jDERIVED_FROM →
Availability heuristic was coined by Tversky and Kahneman 1973 as a specific type of heuristic — a mental shortcut for judging probability and frequency. Under Law 7, which-came-first: the general concept of heuristic predates the specific availability heuristic. The heuristic is a mental shortcut; availability heuristic is a specific named heuristic derived from the broader heuristic concept.
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Record identity
- Created
- Jul 17, 2026, 4:27 PM UTC
- Content hash
- bdab74b889d417ed432c7b4e564bd4cc3da12fe7904fcb616a4cd17e8c559ded