In 1948 Bertram Forer gave a psychology class what he said were individual personality profiles from a test they had taken. Every student received an identical text, assembled from a newsstand astrology column. Asked to rate how well it described them personally, the class averaged 4.26 out of 5. That result, published in 1949, is the Barnum effect, and it is the reason a numerology reading feels accurate without containing any information about you: statements broad enough to fit almost everyone are also specific enough to feel written for one person. The arithmetic on this page is exact; what the output means is the part the effect quietly supplies.