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(Redirected from Barnum effect)
The 'Forer effect' (also called 'personal validation fallacy' or the 'Barnum effect' after P. T. Barnum) is the observation that individuals will give high accuracy ratings to descriptions of their personality that supposedly are tailored specifically for them, but are in fact vague and general enough to apply to a wide range of people. The Forer effect can provide a partial explanation for the widespread acceptance of some pseudosciences such as astrology and fortune telling, as well as many types of personality tests.
A related and more generic phenomenon effect is that of subjective validation (Marks, 2000, p. 41). Subjective validation occurs when two unrelated or even random events are perceived to be related because a belief, expectancy, or hypothesis demands a relationship. Thus people seek a correspondence between their perception of their personality and the contents of a horoscope.
In 1948, psychologist Bertram R. Forer gave a personality test to his students, and then gave them a personality analysis supposedly based on the test's results. He invited each of them to rate the analysis on a scale of 0 (very poor) to 5 (excellent) as it applied to themselves: the average was 4.26. He then revealed that each student had been given the same analysis:
Forer had assembled this text from horoscopes.
Later studies have found that subjects give higher accuracy ratings if the following are true
★ the subject believes that the analysis applies only to them
★ the subject believes in the authority of the evaluator
★ the analysis lists mainly positive traits
See (Dickson and Kelly 1985) for a review of the literature.
★ List of cognitive biases
★ Cold reading
★ The fallacy of personal validation: A classroom demonstration of gullibility, , B. R., Forer, Journal of Abnormal and Social Psychology, 1949
★ The 'Barnum Effect' in Personality Assessment: A Review of the Literature, , D. H., Dickson, Psychological Reports, 1985
★ The Psychology of the Psychic, , D. F., Marks, Prometheus Books, 2000,
★ An autotest
★ Online test demonstrating the effect
★ Skeptic's Dictionary: the Forer effect
★ The Forer effect demonstrated with horoscopes (video, RealMedia format)
Many skeptics believe the popularity of horoscopes (and astrology in general) is due to the ''Forer Effect''.
The 'Forer effect' (also called 'personal validation fallacy' or the 'Barnum effect' after P. T. Barnum) is the observation that individuals will give high accuracy ratings to descriptions of their personality that supposedly are tailored specifically for them, but are in fact vague and general enough to apply to a wide range of people. The Forer effect can provide a partial explanation for the widespread acceptance of some pseudosciences such as astrology and fortune telling, as well as many types of personality tests.
A related and more generic phenomenon effect is that of subjective validation (Marks, 2000, p. 41). Subjective validation occurs when two unrelated or even random events are perceived to be related because a belief, expectancy, or hypothesis demands a relationship. Thus people seek a correspondence between their perception of their personality and the contents of a horoscope.
| Contents |
| Forer's demonstration |
| Variables influencing the effect |
| See also |
| References |
| External links |
Forer's demonstration
In 1948, psychologist Bertram R. Forer gave a personality test to his students, and then gave them a personality analysis supposedly based on the test's results. He invited each of them to rate the analysis on a scale of 0 (very poor) to 5 (excellent) as it applied to themselves: the average was 4.26. He then revealed that each student had been given the same analysis:
Forer had assembled this text from horoscopes.
Variables influencing the effect
Later studies have found that subjects give higher accuracy ratings if the following are true
★ the subject believes that the analysis applies only to them
★ the subject believes in the authority of the evaluator
★ the analysis lists mainly positive traits
See (Dickson and Kelly 1985) for a review of the literature.
See also
★ List of cognitive biases
★ Cold reading
References
★ The fallacy of personal validation: A classroom demonstration of gullibility, , B. R., Forer, Journal of Abnormal and Social Psychology, 1949
★ The 'Barnum Effect' in Personality Assessment: A Review of the Literature, , D. H., Dickson, Psychological Reports, 1985
★ The Psychology of the Psychic, , D. F., Marks, Prometheus Books, 2000,
External links
★ An autotest
★ Online test demonstrating the effect
★ Skeptic's Dictionary: the Forer effect
★ The Forer effect demonstrated with horoscopes (video, RealMedia format)
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