Touching Emotions, Smelling Shapes: Exploring Tactile, Olfactory and Emotional Cross-sensory Correspondences in Preschool Aged Children

A research team from University College London (UCL) and the University of Bristol has published a foundational study, 'Touching Emotions, Smelling Shapes,' examining how young children naturally connect different senses. Working with 26 preschoolers aged 2-4, the researchers used playful tasks to probe cross-sensory correspondences—the systematic ways perceptions in one sense (like smell) influence another (like touch or emotion). Their findings confirm that even at this early developmental stage, children exhibit significant, non-random mappings between sensory modalities and affective judgments.

The study moves beyond simple observation to analyze the underlying association strategies children use, such as linking a rough texture with a 'sad' emotion or a specific scent with a geometric shape. This empirical insight into the architecture of early sensory integration is a key contribution. Furthermore, the team provides a replicable methodological framework for studying cross-sensory cognition in young children, who are often difficult to assess with traditional methods.

Ultimately, this research directly informs the design of next-generation human-computer interaction (HCI). As technologies for learning, communication, and affective regulation increasingly incorporate multi-sensory inputs—from haptic feedback in VR to ambient scent systems—understanding these innate human correspondences is critical. The paper offers concrete design guidelines to help engineers and developers create experiences that feel more intuitive and emotionally coherent by aligning with the brain's natural wiring, rather than working against it.