show that the self fulfilling prophecy at work
they told the school that they had a new test specially designed to identify those pupils who would 'spurt' ahead
this was untrue because the test was in fact simply a standard IQ test
importantly however the teachers believed what they had been told
the researchers tested all pupils but then picked 20% of them purely at random and told the school agan falsely that the test had identified these pupils as 'spurters'
A year later, the randomly picked 'spurter' pupils had actually improved academically
This is because the teachers labelled them as achievers and gave them more encouragement and support