Impact of Availability Heuristic in Healthcare

What is this page about?

An examination of how the availability heuristic, judging likelihood by how easily examples come to mind, distorts healthcare decisions for both patients and clinicians. It covers the news-story effect, cyberchondria and symptom-search loops, clinicians anchoring to recent cases, diagnostic errors and over-testing, base-rate neglect, and media-driven epidemic psychology with a COVID-19 case study, then gives practical debiasing strategies for patients, clinicians, and health systems, closing on the lesson that frequency is not familiarity.

What has been corrected on this page?

Every accepted correction to this page is recorded with the exact change, so readers can see how the page improved over time.

1. 11 July 2026 · corrected by Emir Baycan

   Correct journal: the 1978 Lichtenstein et al. study appeared in the Journal of Experimental Psychology: Human Learning and Memory, not Health Psychology (which began in 1982).

   Before

   A study published in Health Psychology by Lichtenstein, Slovic, Fischhoff, Layman, and Combs (1978)

   After

   A study published in the Journal of Experimental Psychology: Human Learning and Memory by Lichtenstein, Slovic, Fischhoff, Layman, and Combs (1978)

   Why: Health Psychology did not begin publication until 1982, so the 1978 Lichtenstein et al. study could not have appeared there; it was published in Journal of Experimental Psychology: Human Learning and Memory.

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