Her doctoral research investigated the role of iconicity—the resemblance between form and meaning—in early caregiver-child interactions, focusing on how iconic words and gestures support engagement and learning in infancy and early childhood. Across five studies, she combined experimental and corpus-based methods to examine how iconic forms function in naturalistic caregiver–child interactions and influence developmental trajectories.
The first two studies analysed how caregivers use iconic words (e.g., onomatopoeia) in infant-directed speech. In both a small-scale study of 18-month-olds and a larger cross-sectional sample of 13-, 18-, and 23-month-olds, iconic words were associated with greater infant engagement and more exaggerated infant-directed prosody. These findings suggest that iconicity serves multiple functions in caregiver-child interactions.
The third study used an experimental design to assess how iconicity affects word learning. Children aged 18 months and 3 years were taught novel onomatopoeic labels for animal toys that were either congruent or incongruent with the animals' sounds. While both groups learned congruent labels better, the effect reached statistical significance only in the older children. This suggests that sensitivity to form–meaning resemblance may strengthen with age or experience, offering new insight into how iconicity supports vocabulary acquisition across development.
The fourth study analysed a longitudinal corpus of naturalistic interactions to track the frequency and functions of onomatopoeia in caregiver and child speech across development. Onomatopoeia appeared more frequently in younger infants’ vocabularies and in caregivers’ speech to younger children. These words were often produced with playful prosody and typically used for enactment, rather than purely referential purposes—highlighting the multimodal, performative nature of early iconic communication.
The final study explored the emergence of iconic gestures. Analysing video recordings, she found that infants as young as 12 months produced spontaneous, representational gestures that resembled features of referents. These were often produced without direct adult modelling, suggesting an early capacity for embodied, iconic expression. This challenges the assumption that iconic gesture use requires linguistic proficiency or explicit instruction, and reinforces the importance of multimodal interaction in early symbolic development.
Together, these studies provide converging evidence that iconic forms—whether verbal or gestural—play a foundational role in early communication by making meanings more transparent and engaging. Her research contributes to key debates in developmental linguistics and cognitive science around the embodied, multimodal origins of symbolic systems. Importantly, it also lays the groundwork for applied research on how iconicity might support language development and engagement in neurodiverse populations.