This Working Paper summarises preliminary results from the Project 'Pluridentities: Protecting and stimulating plurilingual identities in learners in Europe via inclusive policies and classroom practices', granted by the European Union's Horizon 2020 research and innovation programme (No. 101178914). It focuses on the quantitative data collected in the Dutch context as part of Work Package 5.
Wakelkamp et al. (Mon,) studied this question.