The Barnum effect: why results feel accurate
People rate vague, general descriptions as remarkably accurate for them personally. Any personality result, including an ICA profile, can feel right for this reason alone.
The 1949 experiment
The psychologist Bertram Forer gave his students a personality test, then handed each of them the same description, assembled largely from astrology columns. Asked to rate how well it described them, the students gave an average of 4.26 on a scale from 0 to 5 (Forer, 1949). The psychologist Paul Meehl later named the tendency after P. T. Barnum.
Why it happens
- Statements are general enough to fit almost anyone ("you can be sociable, but you also value time alone")
- They are mostly flattering
- People remember what fits and forget what does not
- An authority, such as a test, presented them
How to check a result
- Read the description for a different result. If it fits you just as well, the description is doing less work than it seems.
- Look for statements that could be wrong about you. Specific claims can be checked; vague ones cannot.
- Take the test again a few weeks later and compare.
- Ask someone who knows you well which description fits better.
What this means for the ICA
ICA profiles describe the order of four preferences, which makes them more specific than a horoscope, but they are not immune. That is why we list descriptions as interpretations and test the instrument's structure and stability in the study. Try it: after taking the free ICA, read another profile and compare.
Questions
Is the Barnum effect the same as the Forer effect?
Yes. Both names describe the same tendency.
Sources
Keep reading
Start with the free ICA.
The Barnum or Forer effect: why vague personality descriptions feel personally accurate, the 1949 experiment behind it, and how to check any test result.