Frequency filter: an open access tool for analysing language development

Ibbotson, Paul; Hartman, Rose M. and Björkenstam, Kristina Nilsson (2018). Frequency filter: an open access tool for analysing language development. Language, Cognition and Neuroscience, 33(10) pp. 1325–1339.



We present an open-access analytic tool, which allows researchers to simultaneously control for and combine language data from the child, the caregiver, multiple languages, and across multiple time points to make inferences about the social and cognitive factors driving the shape of language development. We demonstrate how the tool works in three domains of language learning and across six languages. The results demonstrate the usefulness of this approach as well as providing deeper insight into three areas of language production and acquisition: egocentric language use, the learnability of nouns versus verbs, and imageability. We have made the Frequency Filter tool freely available as an R-package for other researchers to use at

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