Biases and effectsBertram Forer, 1949
A description that fits everyone feels like it was written about you. Yes, the quizzes on this site ride on it too.
A psychology lecturer gave students a personality test and later handed each their "personal result". Students rated how accurate it was out of 5. Average: 4.3. Nearly everyone said it fit them well.
Every student had received the same text, stitched together from an astrology book.
"You have a need for others to like you, yet you tend to be critical of yourself." "At times you are outgoing and sociable; at other times introverted and wary." Written so that anyone reading it sees themselves.
Effective texts share a shape. Say both sides (outgoing at times, reserved at others). Keep it flattering (people accept praise and reject criticism). Frame it as personal — the same text scores higher when the reader believes it was written for them.
Meanwhile the reader keeps the lines that fit and skips the ones that do not (confirmation bias). Lock the two together and any text becomes "accurate".
Plainly: the Dopamine Brain Quiz and the Love Quiz both use this effect. Each of the 16 type descriptions is written so people of that type recognise themselves, and every type gets at least one flattering line.
We do it anyway because the feeling of being described is itself enjoyable — like a horoscope, it gives you a lens on your week and a reason to laugh at a friend. That is also why every result says up front that it is not medicine or science.
Enjoying it and believing it are different. "Huh, maybe" is the right dose. "So this is who I am" is too much.
Horoscopes
Of the twelve entries, the ones for other signs fit about as well as yours. Try reading the next sign along. What fits is the writing, not the stars.
"7 signs you are a..."
A staple of the internet. Four out of seven hits feels like "that is me", but all seven are written to hit most people. Count the misses instead of the hits and the spell breaks.
The quiz on this site
On your result page, look for three lines that are not true of you. Finding them is healthy. Not finding them may just mean the writing is good. Either way it still works as a game.
If you take one thing
"So accurate!" is evidence either that the writing is good or that you are human. Usually both.
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