The Bouba/kiki Effect
This picture is used as a test to demonstrate that people may not attach sounds to shapes arbitrarily: a Canary Island tribe calls the shape on the left “kiki” and the one on the right “bouba”.
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In tests conducted with both English and Tamil speakers, 95% to 98% picked the curvy shape as bouba and the jagged one as kiki, suggesting that the human brain is somehow able to extract abstract properties from the shapes and sounds.


