An open database of children's vocabulary development

Wordbank contains data from 92,771 children
and 105,290 CDI administrations, across
42 languages and 89 instruments:

Wordbank is an open database of children’s vocabulary growth, featuring data from contributors around the world.

Wordbank archives data from the MacArthur-Bates Communicative Development Inventory (MB-CDI), a family of parent-report questionnaires and enables researchers to browse these data in interactive analyses and access them via the wordbankr R package.

Explore what we can learn about child language acquisition through Wordbank in the Wordbank Book (MIT Press, 2021).