Psychology: Mind Your Head

This 'test' was developed by the National Institute of Industrial Psychology.

• Biscuit-packers' test, c,1930

The Visualisation of Cubes Test, devised by the psychologist Colin Elliott in 1983. It was a subtest of the British Ability Scales, used to measure cognitive function in children aged 2-17 years.

• The Visualisation of Cubes Test, 1983

These small plastic tiles are a recent version of the sets first produced by psychologist Margaret Lowenfeld in the 1930s.

• Lowenfield mosaics, 1999