“Wait, dogs actually understand that bouba is round and kiki is spiky?”

Yes, they do show the same association! A recent study (published in Proceedings of the Royal Society B in late 2024) found that dogs, like humans, tend to match "bouba" with rounded shapes and "kiki" with spiky shapes. ChatGPTClaudeGemini

What the study showed

Researchers tested about 70 pet dogs by playing the nonsense words "bouba" and "kiki" through speakers while showing rounded and spiky shapes on screens. Dogs looked longer at the rounded shape when they heard "bouba" (56% of the time) and at the spiky shape when they heard "kiki" (63% of the time). These modest but statistically significant preferences mirror the famous bouba-kiki effect seen across human languages and cultures. ChatGPTClaudeGemini

What this means (and doesn't mean)

This shows dogs display cross-modal sound-shape associations similar to humans—certain sound properties (soft/round vs. sharp/abrupt) map onto visual features. However, it doesn't mean dogs "understand" these words as language or have learned word meanings the way humans do. The experiment measured spontaneous gaze and exploration patterns, not comprehension of referential labels. ChatGPTGemini

Researchers ruled out that dogs were simply reading their owners' unconscious cues, suggesting this might be a more fundamental cross-species phenomenon. Scientists still don't fully understand why this association exists—whether it's an innate biological trait or something dogs learned from exposure to human speech patterns—but the fact that dogs show it hints at something deeper than human language or culture alone. ClaudeGeminiChatGPT