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<p>Languages have evolved in part due to cross-modal associations between shape and sound. A famous example is the Bouba–Kiki effect, wherein humans associate words like bouba/kiki to round/angular shapes. How does the Bouba–Kiki effect work for natural words and shapes that contain a mixture of features? If the effect is holistic, the effect for a composite stimulus would not be explainable using the parts. If the effect is compositional, it will be. Here we provide evidence for the latter possibility. In Experiments <InternalRef RefID="Sec4">1</InternalRef> and <InternalRef RefID="Sec10">2</InternalRef>, we standardized bouba-like and kiki-like shapes and words for use in subsequent experiments. In Experiments <InternalRef RefID="Sec16">3</InternalRef>–<InternalRef RefID="Sec32">5</InternalRef>, we created composite shapes/words by combining bouba-like &amp; kiki-like parts. In all experiments, the Bouba–Kiki effect strength for composite shapes/words was predicted remarkably well as a linear sum of the contributions of the constituent parts. Our results greatly simplify our understanding of the Bouba–Kiki effect, leaving little room for holism.</p>

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Shape and word parts combine linearly in the Bouba–Kiki effect

  • 期刊论文

  • 发表日期：

    2025年9月2日

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  • Ananya Passi,
  • S. P. Arun

摘要

Languages have evolved in part due to cross-modal associations between shape and sound. A famous example is the Bouba–Kiki effect, wherein humans associate words like bouba/kiki to round/angular shapes. How does the Bouba–Kiki effect work for natural words and shapes that contain a mixture of features? If the effect is holistic, the effect for a composite stimulus would not be explainable using the parts. If the effect is compositional, it will be. Here we provide evidence for the latter possibility. In Experiments 1 and 2, we standardized bouba-like and kiki-like shapes and words for use in subsequent experiments. In Experiments 3–5, we created composite shapes/words by combining bouba-like & kiki-like parts. In all experiments, the Bouba–Kiki effect strength for composite shapes/words was predicted remarkably well as a linear sum of the contributions of the constituent parts. Our results greatly simplify our understanding of the Bouba–Kiki effect, leaving little room for holism.