Since the earliest studies on multilingual advantages, it has proved difficult to disentangle language development from general cognition. It remains unclear whether language interdependence is an independent variable or whether observable effects are mediated by cognitive ability. Measurable effects of one language on another typically go hand in…

Both for the first language (L1) and for all additional languages (L2 or L3), grammatical knowledge plays a vital role in understanding texts (e.g., Grabe, 2005). However, little is known about the development and interaction of grammar and reading comprehension in beginning foreign language learning, especially with respect to children with a…