Assessing the effect of lexical aspect and grounding on the acquisition of L2 Spanish past

The present study compares the relative effect of inherent lexical aspect and discursive grounding on the use of L2 Spanish Preterit and Imperfect. The study is based on the analysis of responses to a written 40-item discourse-based forced-choice task among 286 English-speaking learners of Spanish. The analysis of data (repeated measures ANOVA) reveals that as learners gain more experience with the target language, the effect of both lexical aspect and grounding on past tense marking increases. That is, contrary to previous predictions, learners constantly move towards prototypical associations of lexical-narrative factors with morphological markers as knowledge of the second language increases. Second, grounding is the construct that most clearly distinguishes learners from native speakers.