In the same vein, Dehaene et al. (2006) devised a test to analyze the
intuitive comprehension of certain basic concepts of geometry. Their
test was based on a series of arrays of six images, each representing
an intuitive concept of geometry: five images fitted the target concept
(i.e. they were correct), while one contradicted it. Participants included
native Amazon Indians and North Americans who were asked, each in
their own language, to point to the “ugly” image. The results revealed
that: