Rosenthal and Jacobson 1968 study
1. Administered an intelligence test to children in a deprived inner city neighbourhood
2. Told teachers that certain children would experience a sudden boost of intelligence and perform better
3. Tested children a year later
4. Some children performed better on the test
The argument was that teachers believing something to be true made it happen
Despite obvious problems with reliability, ethics and validity, this became an enormously influential study
teacher expectations impact outcome