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The Availability Heuristic01:08

The Availability Heuristic

A heuristic is a general problem-solving framework (Tversky & Kahneman, 1974). You can think of these as mental shortcuts that are used to solve problems. Different types of heuristics are used in different types of situations, and the impulse to use a heuristic occurs when one of five conditions is met (Pratkanis, 1989):
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Measuring the Subjective Value of Risky and Ambiguous Options using Experimental Economics and Functional MRI Methods
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Published on: September 19, 2012

How do people judge risks: availability heuristic, affect heuristic, or both?

Thorsten Pachur1, Ralph Hertwig, Florian Steinmann

  • 1Department of Psychology, University of Basel, Missionsstrasse 60/62, CH-4055 Basel, Switzerland. Thorsten.Pachur@unibas.ch

Journal of Experimental Psychology. Applied
|May 9, 2012
PubMed
Summary
This summary is machine-generated.

People judge risks based on direct experience (availability-by-recall) more than emotional responses (affect heuristic). Media exposure had little impact on risk perception.

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Area of Science:

  • Cognitive Psychology
  • Risk Perception Research
  • Behavioral Economics

Background:

  • Public risk perception is influenced by cognitive heuristics, primarily the availability heuristic and the affect heuristic.
  • Previous research has not systematically compared these heuristics or their predictive power across different risk perception measures.

Purpose of the Study:

  • To systematically test the availability and affect heuristics against each other in public risk judgment.
  • To examine the predictive power of these heuristics across various risk perception measures and risk types.

Main Methods:

  • Two studies were conducted with student samples.
  • Risk perception was measured using frequency, value of a statistical life, and perceived risk.
  • Models of availability and affect heuristics were tested using both homogeneous (cancer) and heterogeneous causes of death.

Main Results:

  • Availability-by-recall, which relies on direct social network experiences, best explained people's risk judgments.
  • Direct experience demonstrated higher ecological validity than affective information.
  • Affective information had a greater impact on value of a statistical life and perceived risk judgments compared to risk frequency.
  • Media exposure played a negligible role in risk judgments.
  • Evidence suggests combined use of availability and affect heuristics.

Conclusions:

  • Direct personal experience is a primary driver of public risk perception, surpassing media influence.
  • Understanding heuristic interplay is crucial for effective risk communication and education campaigns.
  • Risk communication strategies should consider leveraging personal experiences for greater impact.