This paper discusses longitudinal results from a multidisciplinary study on CLIL in French-speaking Belgium. Results from a first data collection indicate both more favourable affective and background profiles in CLIL compared to non-CLIL, thus raising the question whether these differences are due to CLIL or to a selection bias.
De Smet, A., & Mettewie, L. (2018). Favourable affective profiles in CLIL: Chicken or egg? Psychology of Language Learning (PLL3), Tokyo, Japan. https://hdl.handle.net/2078.5/94997