This study examines the role of the timing of obligatory disambiguating information – obligatory cues – and presence/absence of optional morphological markers in resolving temporary syntactic ambiguity in Spanish object relative clauses. Native adult comprehension (Study 1) reveals similar accuracy for clauses with relatively early obligatory cues, regardless of the presence/absence of additional markers, and those with late obligatory cues with additional markers, but reduced accuracy for those with late obligatory cues without additional markers. Given the phonetic resemblance of the late-disambiguated variant with its corresponding subject relative, we conduct two follow-up perceptual identification tasks with the whole relative clause, including the head (Study 2), and relative clause fragments (Study 3). The identification tasks show that, when instructed to attend to the form of the structures, participants perceive acoustic differences but retain a bias towards subject-relative interpretations. Our results suggest that additional markers aid comprehension of non-canonical structures when obligatory cues occur relatively late within the structure and highlight the dominance of predictive processing over perceptual information in such cases of late disambiguation.

Native (L1) and nonnative (L2) speakers sometimes misinterpret temporarily ambiguous sentences like “When Mary dressed the baby laughed happily.” Recent studies suggest that the initially assigned misinterpretation (“Mary dressed the baby”) may persist even after disambiguation, and that L2 speakers may have particular difficulty discarding initial misinterpretations. The present study investigated whether L2 speakers are more persistent with misinterpretation compared with L1 speakers during sentence processing, using the structural priming and eye tracking while reading tasks. In the experiment, participants read prime followed by target sentences. Reading times revealed that unambiguous but not ambiguous prime sentences facilitated processing of the globally correct interpretation of ambiguous target sentences. However, this priming effect was only observed when the prime and target sentence shared the same verb. Comprehension accuracy rates were not significantly influenced by priming effects but did provide evidence of lingering misinterpretation. We did not find significant L1/L2 differences in either priming effects or persistence of misinterpretation. Together, these results suggest that initially assigned misinterpretations linger in both L1 and L2 readers during sentence processing and that L1 and L2 comprehension priming is strongly lexically mediated.

A self-paced reading and translation task was used with learners of English as a second language (L2) to explore what sorts of information L2 learners use during online comprehension compared to native speakers, and how task (reading for comprehension vs. translation) and proficiency affect L2 comprehension. Thirty-six Korean native speakers of English and 32 native English speakers read plausible and implausible subject relative clauses and object relative clauses. Reading times, comprehension accuracy, and translations were analyzed. Results showed that L2 learners were able to use syntactic information similarly to native speakers during comprehension, and that online L2 processing and offline comprehension were modulated by reading goals and proficiency. Results are interpreted as showing that L2 processing is quantitatively rather than qualitatively different from first language processing, i.e. strategically “good enough”.