Working memory training yields improvements in L2 morphosyntactic processing

The present study investigated whether working memory (WM) training enhances morphosyntactic processing in the second language (L2). L2 learners of Spanish in the treatment group completed WM updating pre/post tasks and a moving window task containing sentences with gender agreement. Moreover, the treatment group trained with two WM tasks for five consecutive days, they completed a posttest and a delayed posttest two months after. The results show that the treatment group presented transfer to untrained WM tasks at both posttests, while the control group did not. While neither group showed sensitivity to gender disagreement at pretest, the treatment group was sensitive to violations after training, and this improvement in morphosyntactic processing was sustained at the delayed posttest. The control group, however, remained insensitive at posttest. Taken together, the findings suggest that WM is a malleable system and WM training may be used as a cognitive tool to facilitate L2 morphosyntax.