Chapter 05 of 5
Why Horoscopes Feel True
The Barnum effect — and why vague descriptions feel personal.
- 1948
A personalised profile
Psychologist Bertram Forer gave his students a personality test, then handed each a 'personalised' description of their results.
- The Rating
Remarkably accurate
Students rated how well their description fitted them. On average, they gave it more than 4 out of 5.
- The Reveal
Everyone got the same
Every student had received exactly the same description — much of it taken from a book of horoscopes.
17 more cards in this chapter
Could you answer this?
What was surprising about the descriptions in Forer's 1948 experiment?
🎭 What Makes You You?
- 01The Big FiveThe personality model psychologists actually rely on.
- 02Myers-Briggs on TrialWhy the world's most famous personality test is weak science.
- 03Nature and NurtureWhat twins reveal about where personality comes from.
- 04You Will ChangePersonality isn't set in stone — here's how it shifts through life.
- 05Why Horoscopes Feel TrueThe Barnum effect — and why vague descriptions feel personal.