Cognitive Bias Explorer

Forer effect

Another name for Barnum effect

The tendency to rate vague, general personality descriptions as highly accurate for us personally. It is named after psychologist Bertram Forer, who showed it using a personality test, and is another name for the Barnum effect.

In everyday life

Everyone in a workshop gets the 'personalized' results of a personality quiz, and most rate theirs as a great fit, unaware that all the reports say the same thing.

A career coach hands you a 'custom' profile saying you value security but crave change, and you are amazed at how well it captures you, until a friend shows you the identical profile.

Why your mind does this

To act at all, we need some belief that our choices matter and that we can pull them off. A bit of extra confidence gets us moving, keeps us going after setbacks, and protects our sense of self-worth and our standing in a group.

Its family, in 30 seconds: Confidence to act

How to spot it

Ask whether the description would fit your friends just as well as it fits you.

How to counter it

Swap your results with someone else's and see whether theirs fits you just as well.

Same family: Confidence to act

SourcesForer (1949)Wikipedia

Cognitive Bias Explorer

Cognitive bias · Confidence to act

Forer effect

The tendency to rate vague, general personality descriptions as highly accurate for us personally. It is named after psychologist Bertram Forer, who showed it using a personality test, and is another name for the Barnum effect.