Language Learning最新文献

Linguistic categories can impact visual perception. For instance, learning that two objects have different names can enhance their discriminability. Previous studies have identified a typical pattern of categorical perception, characterized by faster discrimination of stimuli from different categories, a neural mismatch response during early visual processing (100–200 ms), and effects restricted to the right visual field. However, it remains unclear whether language affects perception online or through long-term changes to mental representations in memory. To address this, we tested the impact of newly learned object categories with and without memory consolidation during sleep. We replicated the canonical pattern of categorical perception for categories that underwent consolidation. Without consolidation, linguistic categories still influenced early visual processing but with distinct neural dynamics. Therefore, we found evidence of both transient and long-term effects of language on perception and conclude that memory consolidation plays a crucial role in shaping how linguistic categories modulate perception.

This study is the first to explore microdevelopment in sociolinguistic evaluative judgments of standard German and Austro-Bavarian dialect by adult second language learners of German by using dense time serial measurements. Intensive longitudinal data (10 observations per participant) were collected from four learners at approximately weekly intervals over 3 months. We employed generalized additive models with superimposed periods of significant change to identify rapid developmental phases in individual developmental trajectories. By triangulating these models with qualitative introspective and retrodictive interview data, we identified environmental and psychological stimuli for change. Learners evinced increasing and decreasing periods of significant change, independent of length of residence. Dynamic constellations of identity- and agency-related variables alongside more intensive social interaction with target-variety speakers contributed to significant changes. We discuss findings from a complexity perspective and advocate for microlongitudinal studies in variationist second language acquisition to better capture stimuli for change in learners’ emerging multivarietal repertoires.

To acquire language, learners have to map the language onto the environment, but languages vary as to how much information they include to constrain how a sentence relates to the world. We investigated the conditions under which information within the language and the environment is combined for learning. In a cross-situational artificial language learning study, participants listened to transitive sentences and viewed two scenes, and selected which scene was described by the sentence. There were three conditions, involving different language variants. All variants had free word order but varied as to whether or not they contained morphosyntactic information that defined the subject and object roles of nouns in the sentence. We found that participants were able to learn information about word order and vocabulary from each variant, demonstrating that learners are not reliant on information within a language only, but can combine constraints from language and environment to support acquisition. Data and analyses are available at: https://osf.io/hxqzc/?view_only=ea6ba6fff6bb468e8de2e8596f029dca

The impact of text length on the estimation of lexical diversity has captured the attention of the scientific community for more than a century. Numerous indices have been proposed, and many studies have been conducted to evaluate them, but the problem remains. This methodological review provides a critical analysis not only of the most commonly used indices in language learning studies, but also of the length problem itself, as well as of the methodology for evaluating the proposed solutions. Analysis of three data sets of texts produced by English language learners revealed that indices that reduce all texts to the same length using a probabilistic or an algorithmic approach solve the length-dependency problem; however, all these indices failed to address the second problem, which is their sensitivity to the parameter that determines the length to which the texts are reduced. The paper concludes with recommendations for optimizing lexical diversity analysis.

We investigated the role of cue weighting, second language (L2) proficiency, and L2 daily exposure in L2 learning of suprasegmentals different from the first language (L1), using eye-tracking. Spanish monolinguals, English–Spanish learners, and Mandarin–Spanish learners saw a paroxytone and an oxytone verb (e.g., FIRma–firMÓ “s/he signs–signed”), listened to a sentence containing one of the verbs, and chose the one that they heard. The three languages have contrastive lexical stress, but suprasegmentals have a greater functional load in Mandarin than in English. Monolinguals predicted suffixes accurately with both stress conditions and favored oxytones, but learners predicted suffixes accurately only with oxytones, the condition activating fewer lexical competitors. Monolinguals predicted suffixes accurately sooner but at a slower rate than did learners. L2 proficiency, but not L1 or L2 exposure, facilitated L2 predictions. In conclusion, learners of a contrastive-stress L1 rely on L2 suprasegmentals to the same extent as monolinguals, regardless of their L1. Lower L2 proficiency and higher cognitive load (more lexical competitors) reduce learners’ reliance on suprasegmentals.

Verb-marking errors such as she play football and daddy singing are a hallmark feature of English-speaking children's speech. We investigated the proposal that these errors are input-driven errors of commission arising from the high relative frequency of subject + unmarked verb sequences in well-formed child-directed speech. We tested this proposal via a preregistered corpus analysis and asked at what level the effects occur: Is it the relative frequency of specific subject + unmarked verb sequences in the input that is important, or is it simply that verbs become entrenched, such that their frequency of appearance with any third person singular subject accounts for errors? We found that the best predictor of children's verb-marking errors is the relative frequency of unmarked forms of specific subject + verb sequences. Our results supported the proposal that children's apparent omissions of certain grammatical morphemes are in fact input-driven errors of commission and provided insight into the mechanisms by which this occurs.

We conducted a multisite replication of Yang and Lyster's (2010) study investigating the effects of recasts and prompts on learning English regular and irregular past tense. Our study was conducted with intact high school and vocational school classes in Italy and Bosnia. Our participants were young adolescents (14–15 and 16–17 years old), a population that has been largely ignored in second language acquisition (SLA) research. We followed the design of the original study, but we also included a few modifications regarding the elicitation materials. The findings from our study did not fully align with Yang and Lyster's results. We found no effect of group and no evidence of the superiority of either prompts or recasts in either written or oral data in either Bosnia or Italy. However, we found a steady increase in scores over time from pretest to posttests in oral data in all groups at both sites.

This multisite study replicates Webb, Newton, and Chang's (2013) study on the effect of repetition on incidental learning of multiword units (MWUs). Even though more researchers have started to investigate MWUs, most data have been collected from university students. Furthermore, the large effect of MWU repetition on learning reported by Webb et al. has not yet been corroborated. Data in our study were collected from two university samples (EFL students in Poland and Flanders) and one nonuniversity sample (Flemish EFL learners in secondary schools). Unlike Webb et al., we adopted a counterbalanced within-participants design. Participants read and listened to a modified graded reader in which target MWUs occurred 1, 5, 10, or 15 times. In line with the initial study, we found a positive effect of repetition. However, the learning gains were smaller, and the number of repetitions needed was different. The findings were consistent across the university and nonuniversity samples. The study concludes with a discussion of these findings in relation to both pedagogical implications and the benefits of multisite replication research.

Hu and Nation's (2000) study, which stipulated that second language (L2) readers need to be familiar with 98% of lexical items for adequate text comprehension, has become highly influential in L2 vocabulary research and pedagogy. However, the 98% critical threshold figure is based on findings from a research project in which a regression analysis was conducted with only 66 university students in New Zealand. The present study replicated Hu and Nation's research in a context different from a typical Western, educated, industrialized, rich, and democratic context with a sample of 104 Sri Lankan adult L2 learners in a nonacademic context. They each took a Vocabulary Levels Test and read one of five versions of two reading texts at different levels of density of unknown words before answering comprehension questions. The results of the original study could not be fully replicated.

The comprehension of signed language requires linguistic and visual–spatial processing, such as perspective-taking for correctly interpreting the layout of a spatial scene. However, little is known about how adult second-language (L2) learners process visual–spatial constructions in a signed language that they are studying, including which angles of viewing are most challenging to process and whether there are relationships between perspective-taking and the comprehension of non-spatial (i.e., non-scene based) constructions. We examine the performance of 95 intermediate signers of American Sign Language (ASL) on linguistic and non-linguistic perspective-taking tests. Half the participants completed a test of narrative comprehension that included visual–spatial scenes, and half took a test of signed phonological and morphophonological discrimination. Performance on linguistic perspective-taking correlated moderately with performance on the narrative, but not with the discrimination test. These findings support the claim that perspective-taking skills are yoked to some—but not all—aspects of signed language learning.