A recent study published in Proceedings of the Royal Society B: Biological Sciences provides evidence that domestic dogs exhibit patterns of visual attention consistent with the classic 'bouba/kiki' effect. Researchers led by animal behaviorist Eleonora Biffi at the University of Parma conducted two controlled experiments with 70 pet dogs to assess whether animals associate specific phonetic qualities with geometric shapes.

The first experiment involved 51 dog-owner pairs in a room equipped with two screens and paired speakers positioned on opposite walls. After allowing dogs to acclimate, owners sat facing the center while alternating auditory and visual stimuli played through the left and right displays. Each trial presented either the syllable 'Bouba' or 'Kiki' accompanied by a shape—one rounded, the other angular—displayed on one of the screens. Over approximately 15 minutes, combinations of sound and shape were randomized across trials. A GoPro camera recorded each dog's head orientation, and subsequent video analysis employed AI-based tracking to measure fixation points and exploratory behavior.

Results indicated a statistically significant tendency for dogs to direct their attention toward the rounded shape when the syllable 'Bouba' was played, and toward the angular shape when 'Kiki' was played. This pattern suggested an implicit mapping between auditory cues and visual features, mirroring human responses observed in prior iterations of the test.

In the second experiment, 19 additional dogs were exposed to identical visual stimuli while their owners wore headphones playing rock music to eliminate potential social cues. Under these conditions, the previously observed bias toward spiky shapes in the first cohort diminished, and no significant preference emerged between shapes. The researchers noted that this shift implied owner behavior—such as subtle head movements or gaze direction—may have influenced canine attention in the initial trial.

The authors proposed several hypotheses to explain the findings. One possibility is that dogs' muzzle morphology, which tends to be more angular in ancestral breeds and wolves, may predispose them to associate certain visual stimuli with specific sounds. Another theory suggests that domestication has fine-tuned dogs' sensitivity to human communicative signals, enabling them to link phonetic patterns with perceptual categories.

While the study does not establish a definitive cognitive mechanism, it contributes to growing evidence that dogs possess a nuanced capacity to integrate auditory and visual information in ways that parallel human perceptual biases. Further research will be needed to isolate the developmental and evolutionary factors underlying this phenomenon.

The findings were published in Proceedings of the Royal Society B: Biological Sciences. The article was fact-checked by Rebecca Dyer and edited by Rebecca Dyer. While the publisher emphasizes editorial rigor, human oversight means occasional errors may occur. Readers are encouraged to report discrepancies through official channels.