“…Occasional performance breakdowns in mature, proficient language users have traditionally been used in psycholinguistics to provide insights onto the mechanisms of “normal” language processing, its preferences, and limitations (Fromkin, 1984; Garrett, 1988; Pritchet, 1988). Learners’ errors can be just as useful in that they may offer insights onto how learners’ grammatical representations and processing develop across time (e.g., children's overgeneralization errors; Marcus et al, 1992) and how they are affected by factors such as age of acquisition, cognitive maturation, and cross-linguistic influences (e.g., Antón-Méndez, 2010).…”