The data collection took place during a research project called 'False beginners' (01/09/2016-31/08/2017). The project investigated Flemish learners' knowledge of English before the start of formal instruction. The project was funded by Artevelde University of Applied Sciences (internal funds). A project description (in Dutch) can be found here:
https://www.arteveldehogeschool.be/projecten/false-beginners-beginsituatie-voor-het-schoolvak-engels-0.