The Relationship Between Second Language Acquisition and Nonverbal Cognitive Abilities Woumans, E., Ameloot, S., Keuleers, E., & Van Assche, E. (2019). The relationship between second language acquisition and nonverbal cognitive abilities. Journal of Experimental Psychology: General, 148(7), 1169–1177.
In this study, the authors discuss the progress of 40 children when they first started to acquire a second language implicitly through immersion. The study included measures of intelligence, cognitive control, and language skills in acquiring a second language. Read pages 1169-1177.