A French psychologist built a test to find Paris schoolchildren who needed extra help and warned it must never be used to fix a child's intelligence. In America it became a sorting machine, spread by mass testing and tracking. In 1963 the new term learning disabilities began to pry the label of just slow open.
How far a creator is responsible for later misuse of a tool, and whether tracking helps or harms, remain open. Historians also argue whether diagnostic labels help children by unlocking services or hurt them through stigma.