Education

PhD (University of British Columbia)

Research interests

My research investigates infant development, with a focus on language acquisition. I use primarily behavioral methods such as eye tracking, looking-time, sucking, and reaching measures. I am particularly interested in infants growing up in bilingual environments and the mechanisms that they use to acquire two languages simultaneously. Some current projects compare speech perception and word learning in monolingual and bilingual infants. A related line of work investigates bilingual parenting, and how the language strategies used by bilingual families influence children’s language learning. We are now using our findings to detect bilingual children at risk for language impairment and delay. I also have a strong interest in and commitment to large-scale collaborations and Open Science.

I welcome e-mails from prospective MA and PhD students interested in applying to admission to the research training program, who have interests in early bilingualism and Open Science. Please get in touch well before our December 1st deadline.

PSYC 311

Research Methods II

PSYC 431

Infancy

PSYC 333

Lifespan Development

PSYC 726

Graduate seminar in bilingualism

For a full list of publications click here

Kremin, L.V., & Byers-Heinlein, K. (2021). Why not both? Rethinking categorical and continuous approaches to bilingualism. International Journal of Bilingualism. https://doi.org/10.1177/13670069211031986 Preprint:  https://psyarxiv.com/nkvap

Byers-Heinlein, K., Tsui, S. A., Bergmann, C., et al. (2021). A multi-lab study of bilingual infants: Exploring the preference for infant-directed speech. Advances in Methods and Practices in Psychological Science. [Registered Report]. January 2021. https://doi.org/10.1177/2515245920974622 Preprint: https://psyarxiv.com/sqh9d/ Repository: https://osf.io/zauhq/

Orena, A.J., Byers-Heinlein, K., & Polka. L. (2020). What do bilingual infants actually hear? Evaluating measures of speech input to bilingual-learning 10-month-olds. Developmental Science, 23:e12901. https://doi.org/10.1111/desc.12901.  Preprint: https://psyarxiv.com/2qnhw

Schott, E., Rhemtulla, M., & Byers-Heinlein, K. (2019). Should I test more babies? Solutions for transparent data peeking. Infant Behavior and Development, 54, 166-176. https://doi.org/10.1016/j.infbeh.2018.09.010. Repository: https://osf.io/qjx7t/

Byers-Heinlein, K., Morin-Lessard, E., & Lew-Williams, C. (2017). Bilingual infants control their languages as they listen. Proceedings of the National Academy of Sciences, 114(34), 9032–9037. https://doi.org/ 10.1073/pnas.1703220114 Repository: https://osf.io/htn9j/

Byers-Heinlein, K. (2013). Parental language mixing: Its measurement and the relation of mixed input to young bilingual children’s vocabulary size. Bilingualism: Language and Cognition, 16(1), 32–48. https://doi.org/10.1017/S1366728911000010

Byers-Heinlein, K., Burns, T.F., & Werker, J.F. (2010). The roots of bilingualism in newborns. Psychological Science, 21, 343–348. https://doi.org/10.1177/0956797609360758 Postprint: https://psyarxiv.com/hfsrk/ Repository: https://osf.io/9shr7/