Rosenthal and Jacobson (1968) told a school they had a new test specially designed to identify those pupils who would ‘spurt’ ahead but truly was a simple IQ test. They tested all of the pupils, but randomly picked 20% of them and told the school these children were ‘spurters’. A year later, they found 47% the 'spurters' made significant progress, with greater effect on younger children. The teacher’s beliefs were influenced by the ‘test’, and these beliefs had then been conveyed onto the children, creating a self-fulfilling prophecy in the pupils.