Audun Rørvik Rosslund
About
I am an associate professor of developmental psychology at the Department of Psychology, NTNU. My research primarily focuses on language development in infants and toddlers, with a particular emphasis on the mechanisms that drive language acquisition, the role of environmental factors in shaping language development, and the design of effective tools for early language assessment.
Recently, I have focused on associations between early vocabulary size and various aspects of children's home environments, such as siblings, screen time, shared book reading, pacifier use, and acoustic features of parents’ speech (infant-directed speech).
I use a range of methodological approaches in my work, including eye-tracking and pupillometry, touch-based methods, questionnaires, and acoustic analyses of parent–child interaction. I am committed to Open Science practices, and involved in the ManyBabies consortium, a global multi-lab collaboration that promotes replicability and generalisability in developmental psychology.
Publications
- Rosslund, A. (2025). Learning words in context. Nature Reviews Psychology. doi: 10.1038/s44159-025-00526-x
- Rosslund, A., Mayor, J., & Kartushina, N., (2025). Norwegian parents do not modulate infant-directed speech based on their infants’ attributed word knowledge. Developmental Psychology. doi: 10.1037/dev0002077
- Rosslund, A., Kartushina, N., Serres, N., & Mayor, J. (2025). Early vocabulary acquisition: From birth order effect to child-to-caregiver ratio. Child Development. doi: 10.1111/cdev.14251
- Rosslund, A., Varjola, N., Mayor, J., & Kartushina, N. (2025). Longitudinal changes in consonant production in infant-directed speech and infants’ early speech production from 6 to 12 months. Infant Behavior and Development. doi: 10.1016/j.infbeh.2024.102018
- Rosslund, A., Mayor, J., Cristia, A., & Kartushina, N. (2024). Native and non-native vowel discrimination in 6-month-old Norwegian infants. Infant Behavior and Development. doi: 10.1016/j.infbeh.2024.101992
- Rosslund, A., Kartushina, N., & Mayor, J. (2024). Associations between shared book reading, daily screen time and infants' vocabulary size. Journal of Child Language. doi: 10.1017/S0305000924000291
- Rosslund, A., Mayor, J., Mundry, R., Singh, A. P., Cristia, A., & Kartushina, N. (2024). A longitudinal investigation of the acoustic properties of infant-directed speech from 6 to 18 months. Royal Society Open Science. doi: 10.1098/rsos.240572
- Rosslund, A., Hagelund, S., Mayor, J., & Kartushina, N. (2023). Mothers' and fathers' infant-directed speech have similar acoustic properties, but these are not associated with direct or indirect measures of word comprehension in 8-month-old infants. Journal of Child Language. doi: 10.1017/S0305000923000557
- Rosslund, A., Mayor, J., Óturai, G., & Kartushina, N. (2022). Parents’ hyper-pitch and low vowel category variability in infant-directed speech are associated with 18-month-old toddlers’ expressive vocabulary. Language Development Research. doi: 10.34842/2022.0547
- Lo, C. H., Rosslund, A., Chai, J. H., Mayor, J., & Kartushina, N. (2021). Tablet assessment of word comprehension reveals coarse word representations in 18–20‐month‐old toddlers. Infancy. doi: 10.1111/infa.12401
- Kartushina, N., Rosslund, A., & Mayor, J. (2021). Toddlers raised in multi-dialectal families learn words better in accented speech than those raised in monodialectal families. Journal of Child Language. doi: 10.1017/S0305000921000520
Registered Reports (Stage 1)
- The ManyBabies Consortium (accepted pending data collection). ManyBabies 5: A large-scale investigation of the proposed shift from familiarity preference to novelty preference in infant looking time. Nature Human Behaviour.
- Laeng, B., Mayor, J., Rosslund, A., & Kartushina, N. (accepted pending data collection). Pupillary response to a brightness illusion in infants. Collabra: Psychology.
- Serres, N., Mayor, J., Rosslund, A., & Kartushina, N., (accepted pending data collection). The role of dialect variability on mispronunciation sensitivity: An insight to infants’ early language development from a Norwegian context. Infancy.
- The ManyBabies Consortium (accepted pending data collection). ManyBabies 3: A multi-lab study of infant algebraic rule learning. Developmental Science.
- The ManyBabies Consortium (accepted pending data collection). Action anticipation based on an agent’s epistemic state in toddlers and adults. Child Development.