The Kiki-Bouba effect is deeper than you think

You already know all about Kiki and Bouba, but the truth goes way deeper than you think. It turns out the Kiki-Bouba effect isn’t really about language at all, but it can tell us a lot about our brains, why languages look the way they do, and maybe even where language came from in the first place! Chapters 0:00 - The mystery of Kiki-Bouba 3:16 - Shape and letters 5:37 - What babies know 7:05 - Baby chicks! 8:07 - The phonetics of Kiki-Bouba 9:51 - Let’s do an experiment 10:41 - The sound of round 11:26 - Deep origins 12:43 - The impact of Kiki-Bouba Sources Blasi et al. (2016). Sound–meaning association biases evidenced across thousands of languages. Bremner et al. (2013). ‘‘Bouba’’ and ‘‘Kiki’’ in Namibia? A remote culture make similar shape–sound matches, but different shape–taste matches to Westerners. Ćwiek et al. (2021). The bouba/kiki effect is robust across cultures and writing systems. Davis (1961). The fitness of names to drawings. A cross-cultural study in Tananyika. Fort & Schwartz (2022). Resolving the bouba‑kiki effect enigma by rooting iconic sound symbolism in physical properties of round and spiky objects. Hinton, Nichols & Ohala (1994). Sound Symbolism. Kalan, Mundry & Boesch (2015). Wild chimpanzees modify food call structure with respect to tree size for a particular fruit species. Köhler 1929. Gestalt Psychology. Loconsole, Varela & Regolin (2026). Matching sounds to shapes: Evidence of the Bouba-Kiki effect in naïve baby chicks. Lockwood & Dingemanse (2015). Iconicity in the lab: a review of behavioral, developmental, and neuroimaging research into sound-symbolism. Lupyan & Casasanto (2014). Meaningless words promote meaningful categorization. Sidhu & Pexman (2017). A prime example of the maluma/takete effect? Testing for sound symbolic priming. Maurer, Pathman & Mondloch (2006). The shape of boubas: sound–shape correspondences in toddlers and adults. Nielsen & Rendall (2011). The sound of round: Evaluating the sound-symbolic role of consonants in the classic takete-maluma phenomenon. Ozturk, Krehm & Vouloumanos (2013). Sound symbolism in infancy: Evidence for sound–shape cross-modal correspondences in 4-month-olds. Ramachandran & Hubbard (2001). Synaesthesia—A window into perception, thought and language. Sapir (1929). A study in phonetic symbolism.