We use visual-world eye-tracking and gating methods to investigate whether Spanish monolinguals and English late learners of Spanish use prosodic cues (lexical stress) to anticipate morphological information (suffixes) during spoken word recognition, and if they do, whether L2 proficiency and working memory (WM) mediate their anticipatory abilities. Our findings show that the monolinguals used prosodic information to predict word endings in both tasks, regardless of first-syllable stress (stressed, unstressed) and structure (CV, CVC). In contrast, the beginning learners did not use prosodic information to anticipate word suffixes in any task or condition. Importantly, the advanced learners mirrored the monolinguals, except in words with first-syllable CV structure, but were slower than the monolinguals. Finally, WM was not associated with anticipatory eye movements, though results were inconclusive for offline processing. Taken together, the present study shows that suprasegmental information facilitates morphological anticipation during spoken word recognition, and that adult learners can gain anticipatory processing patterns qualitatively, but not quantitatively, similar to monolinguals.

The experimental procedures utilized in the present study have been approved by a Human Subjects Protection Program supervised by an Institutional Review Board. All participants signed an informed consent form prior to their participation in the tasks reported in the present study. The authors declare that they do not have any conflicts of commitment.

Native speakers use suprasegmental information to predict words, but less is known about segmental information. Moreover, anticipatory studies with non-native speakers are scarce and mix proficiency with anticipatory experience. To address these limitations, we investigated whether Spanish monolinguals and advanced English learners of Spanish use suprasegmentals (stress: oxytone, paroxytone) and segmentals (syllabic structure: CVC, CV) to predict word suffixes, and whether increased anticipatory experience acquired via interpreting will facilitate anticipation in non-interpreting L2 situations. Eye-tracking data revealed that: (1) the three groups made use of the linguistic variables, and L2 groups did not anticipate in CV paroxytones; (2) everybody anticipated better with the less frequent conditions (oxytones, CVC) having fewer lexical competitors; (3) monolinguals anticipated earlier than L2 learners; and (4) interpreters anticipated at a faster rate in some conditions. These findings indicate that less frequent suprasegmental and segmental information and anticipatory experience facilitate native and non-native spoken word prediction.

Research on the acquisition of L2 phonology in sequential language learners has stressed the importance of language use and input as a means to accurate production and perception; however, the two constructs are difficult to evaluate and control. This study focuses on the role of language use during the initial stages of development of phonetic categories related to stop voicing and analyzes the relationship between production and perception. Native English-speaking late learners of Spanish provided production/perception data on a weekly basis throughout the course of a seven-week immersion program in which L1 use was prohibited. The production/perception data were analyzed using generalized linear mixed effects models. Generalized additive mixed models were used to analyze and compare the learning trajectories of each modality. The analyses revealed phonetic learning in both production and perception over the course of the program. Perception gains paralleled those of native bilinguals by the conclusion of the program and preceded production gains. This study is novel in that it provides production/perception data in a semi-longitudinal design. Moreover, the beginning adult learners are examined in a learning context in which L1 use was minimal and L2 input was maximized. Taken together, the experiments suggest that L2 phonetic category formation can occur abruptly, at an early stage of development, is perceptually driven, and appears to be particularly fragile during the initial stages of learning.

This study investigates how fluent second-language (L2) learners of English produce and perceive the /æ/–/ɑ/ vowel contrast of Southwestern American English. Two learner groups are examined: (1) early, proficient English speakers who were raised by Spanish-speaking families but who became dominant in English during childhood and, as adults, lack communicative abilities in Spanish, and (2) Spanish-speaking late learners of English who continue to be dominant in Spanish. The participants provided data in three tasks: one production and two perceptual. The study finds that both learner groups differ from native controls in their production and perception of the /æ/–/ɑ/ contrast. The findings shed light on our understanding of the relative effects of age (at onset of language exposure) and language dominance (at time of testing) by showing that sequential bilingualism impacts phonetic behavior even when speakers have become dominant in the target language.