Bouba-kiki effect

Bouba/Kiki Effect

The bouba/kiki effect or kiki/bouba effect is a phenomenon of crossmodal correspondence between sounds and shapes. It is a tendency in associating the nonsense words bouba with a round shape and kiki with a spiky shape in systematic ways. Explanations of the bouba/kiki effect are typically described through iconic cross-sensory mechanisms. These mechanisms imply that the effect arises from a process where the properties inherent in the sound form of nonsense words or their motor articulations are directly matched to the properties of the abstract shapes. The bouba/kiki effect is a form of sound symbolism and considered as a universal sound-shape correspondence.