A test taken by Colorado teens in 1960 has become the basis for a 58-year-long study of Alzheimer’s disease

Jeannie Druckenmiller remembers the first time she took the test. She was at her desk — the second seat from the front, in the middle row — in homeroom at the former Horace Mann Junior High School in Denver.
The test took multiple days. That she knows. But Druckenmiller can’t remember what year she took it — she attended the school from 1958 to 1960 — or what questions it asked. And she didn’t know what it was for.
What Druckenmiller didn’t —