The availability heuristic (English Availability heuristic) belongs in the social psychology to the so-called judgement heuristics, which to a certain extent rules of thumb represent, in order to be able to judge circumstances also if no entrance to precise information exists. The designation availability error (English Availability error) is likewise common for those the player false conclusion used perception distortion. It is based on the tendency to remind certain events more highly to wichten and rather than other events.

Explanation

The availability heuristic can be used, if the importance or frequency (respectable probability) of an event to be judged must, but the time, the possibility or the will is missing at the same time, in order to fall back to precisely (e.g. statistic) data. In such cases the judgement becomes instead of it affects, as available this event or examples of similar events is in the memory. Events, which we remember very easily, seem to be more probable us therefore than events, which we can remember only with difficulty. For this reason one would know for instance the probability to become murdered or victims of an act of violence when quite highly estimate, if one read recently a report over a murder or in the media frequently such reports meets. This heuristic can be used also automatically, without this is really conscious to us.

Luck players are inclined in resounding with many money play automats rather to feed their automat with further money because they observe from time to time somebody else when winning and estimate their own chances then more highly. One reminds the profits of other lighters than the many more frequent losses. The fact that someone won, does not change the current chances of winning, and with the concentration on the number of profits one neglects the number of the losses. Humans constantly make this error, although the chances are just as bad in the group as at an individual machine. In the group it is simply easier to remember profits than at an individual automat.

Other examples:

• "“Excusing it the delay - I had on the way at each traffic light red."”
• "“My friend is a Choleriker, a typical Widder."” (The speaker does not remind that he met already hundred "“atypical Widder"”, which were not cholerisch assessed and believes therefore in the alleged connection between the character and the Tierkreiszeichen.)

Investigations

In an investigation of Tversky and Kahneman (1974) test subjects were asked to read itself a list with male and female names. One arranged the lists in such a way that sex only a name by famous persons and the other only invented, unknown name had been assigned in each case. Subsequently, the test subjects were asked to indicate of which sex of more names on the list were. The pro gangs did not know however that on all lists directly many male and female names had to be found. The test subjects in most cases estimated themselves and indicated, more name of that sex to have read, which the famous names had been assigned. One can assume now the test participants could remember the names of the famous persons - even due to their celebrity - more leicher. When they were requested to estimate whether more man or more woman name on the lists had confessed, therefore the names of the prominent ones were automatically easier to remind and thus - subjectively - in the majority.

Source

• Tversky, A. & Kahneman, D. (2005). Judgment of under Uncertainty: Heuristics and Biases. In Bazerman, max of H (OD), Negotiation, decision making and conflict management, volume of 1-3. (pp. 251-258). Northampton, mA, US: Edward Elgar Publishing.
• Tversky, A. & Kahneman, D. (1974). Judgment more under uncertainty: Heuristics and of biases. Science, 185 (4157), 1124-1131.

See also: illusory correlation

Articles in category "Availability heuristic"

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Related Websites

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• Availability Heuristic
  This is where we make a judgement based on what we can remember, rather than complete data.


• Availability heuristic - Wikipedia, the free encyclopedia
  The effect of imagining an event on expectations for the event: An interpretation in terms of the availability heuristic. Journal of Experimental Social ...


• Thinking Page - availability heuristic
  The Availability Heuristic. This applet below demonstrates the error in judgment called ... The "availability heuristic" works because of how memory works. ...